strangeness in quark matter 2015sqm.jinr.ru/images/sampledata/abstracts3.pdf · 2015. 7. 5. ·...

STRANGENESS IN QUARK MATTER2015

Abstracts book

https://indico-new.jinr.ru/conferenceDisplay.py?confId=34

Table of contents

Thermal and non-thermal charmed meson production in heavy ions collisions at the LHC (0) 1. . . . . . . . . . . . . . . . . . . .

Centrality dependence of elliptic flow of multi-strange hadrons in Au+Au collisions at sqrt(s_{NN} = 200 GeV(1) 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

EVOLUTION OF QUARK-GLUON PLASMA AND QUARK-HADRON PHASE TRANSITION (3) 4. . . . . . . . . . . . . . .

Semi-Analytical Relativistic Hard-Scattering Integral for Heavy Quark Production (4) 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Can hot interacting hadrons become a “perfect” fluid? (5) 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

eccentricity evolution in relativistic heavy ion collisions (7) 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Description of High-Energy pp Collisions Using Tsallis Thermodynamics: Transverse Momentum andRapidity Distributions (8) 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

The Tsallis Distribution at Large Transverse Momenta (9) 10.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Feasibility Study of Phi-meson (1020) Production at NICA/MPD (10) 11.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

"A Feasibility Study of Hypernuclei Reconstruction at NICA/MPD" (11) 12.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Study of clusters and hypernuclei production with the NICA/MPD and BM@N experiments (12) 13.. . . . . . . . . . . . . . .

Strange mesons in p+p, d+Au, Cu+Cu and Au+Au collisions at \sqrt{s_{NN}} = 200 GeV in PHENIXexperiment at RHIC (16) 14.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Toward a understanding to the RAA and v2 puzzle for heavy quarks (67) 15.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PHENIX Measurements of Anisotropic Flow in Heavy-Ion Collisions at RHIC energies. (68) 16.. . . . . . . . . . . . . . . . . . . . . .

Impact of momentum state anisotropy on heavy quark-dynamics (69) 17.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electromagnetic and strange probes of dense nuclear matter at NICA/MPD: a feasibility study (70) 18.. . . . . . . . . . . .

A Feasibility Study of Hyperon Reconstruction in Au-Au collisions at NICA (71) 19.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Beam Energy Scan using a viscous hydro+cascade model (72) 20.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Bose-Einstein correlations of charged kaons in $p+p$ collisions measured with the STAR detector (73) 21.. . . . . . . .

Correlations and fluctuations in large and small systems (74) 23.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strange and multi-strange hadrons in heavy-ion collisions with a hybrid approach (75) 24.. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Two-particle correlation measurements in p+Nb reactions at sqrt(sNN) = 3.18 GeV (76) 25.. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Conductivity of an anisotropic QGP (77) 26.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Reference calculations for subthreshold Xi production (78) 28.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Correlations between elliptic flow and identified hadron spectra in Pb-Pb collisions explored by ALICE viaevent shape engineering (79) 29.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Bose–Einstein correlations of charged and neutral kaons in pp and Pb-Pb collisions at the LHC with theALICE experiment (80) 31.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Recent results on two-particle angular correlations in ALICE (81) 33.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Charmonium production at mid-rapidity in Pb-Pb and p-Pb collisions with ALICE (82) 34.. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Charmonium production in pp, p-Pb and Pb-Pb collisions at forward rapidity with the ALICE detector at theLHC (83) 35.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Low-mass dimuon measurements in pp, p-Pb and Pb-Pb collisions with ALICE at the LHC (84) 37.. . . . . . . . . . . . . . . . .

Low-Mass Dielectron Measurements in pp, p-Pb and Pb-Pb Collisions with ALICE (85) 38.. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Measurement of D-meson production in Pb-Pb collisions at the LHC with ALICE (86) 39.. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Measurements of D+(s) production in pp, p-Pb and Pb-Pb collisions with ALICE at the LHC (87) 40.. . . . . . . . . . . . . . .

D-meson production in pp and p-Pb collisions measured with ALICE at the LHC (88) 41.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Heavy-flavour and W-boson production measurements via leptonic decay channels with ALICE at the LHC(89) 43.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Latest results from the NA61/SHINE energy scan (90) 44.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

(Anti-)strangeness production in heavy-ion collisions (91) 45.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Heavy hadrons in dense matter (92) 46.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Production of strange hadrons at LHC energies measured with the ALICE detector (93) 47.. . . . . . . . . . . . . . . . . . . . . . . . . . .

Resonance production in pp, p-Pb and Pb-Pb collisions measured by ALICE at the LHC (94) 48.. . . . . . . . . . . . . . . . . . . . .

Charm quark and charmonium production in quark-gluon plasma (95) 49.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Recent results for the (anti-)(hyper-)nuclei production and searches for exotica by ALICE at the LHC (96) 50..

Light flavour hadron production at intermediate and high pT measured with the ALICE detector (97) 51.. . . . . . . . .

Soft particle production and study of collective phenomena with the ALICE detector at the LHC. (98) 52.. . . . . . . . .

Centrality dependence of particle production in p-Pb collisions at sqrt(s_NN)= 5.02 TeV measured by ALICE(99) 53.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Prospects for heavy flavour measurements with the ALICE inner and forward tracker upgrade (100) 55.. . . . . . . . . .

Lambda hyperon production in proton-proton reactions at 3.5~GeV measured with HADES (101) 56.. . . . . . . . . . . . . . .

Importance of different energy loss effects in jet suppression at RHIC and LHC (102) 57.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strangeness production in U+U collisions at RHIC (104) 59.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

From the lepton protoplasm to hadron genesis (106) 60.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Measurements of strange hadrons K^0_{S}, Lambda and Xi from Au+Au collisions at sqrt_{s_{NN} = 14.5 GeVin STAR (109) 62.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

J_psi and psi(2S) measurements in p+p collisions at sqrt{s} = 200 and 500 GeV with the STAR experiment (110) 64

Local equilibration and Cooper-Frye negative contributions in a coarse-grained transport approach (111) 65.. . . .

Charged particle production in lead-lead and proton-lead collisions measured by the ATLAS detector. (112) 67..

An evidence for the hadron-quark-gluon mixed phase formation in nuclear collisions (113) 68.. . . . . . . . . . . . . . . . . . . . . . .

Strong Decays of Upsilon(4s), phi(1020) and Sigma(1385) in Magnetic Field (115) 70.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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SELF-SIMILARITY OF STRANGENESS PRODUCTION IN pp COLLISIONS AT RHIC (116) 72.. . . . . . . . . . . . . . . . . . . . . .

Heavy Flavors in Heavy Ion Collisions with PHENIX Experiment at RHIC (117) 73.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hyperon puzzle and the RMF model with scaled hadron masses and coupling constants (118) 74.. . . . . . . . . . . . . . . . . . . .

Inverse magnetic catalysis in the three-flavor NJL model with axial-vector interaction (119) 75.. . . . . . . . . . . . . . . . . . . . . .

Study of Coalescence and Collectivity in pPb and Pb-Pb collisions at LHC energy using String Melting versionof A Multiphase Transport Model (120) 76.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strange behavior of rapidity dependent strangeness enhancement of particles containing and not containingleading quarks (121) 77.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Formation of hypernuclei in relativistic ion collisions (122) 78.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strangeness production and long-range correlations in pp collisions in string fusion approach (123) 79.. . . . . . . . . . . .

Search for the critical point in heavy-ion collisions (124) 80.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Progress towards A Fixed-Target ExpeRiment at the LHC: AFTER@LHC (125) 81.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Scaling Properties of Particle Production, Azimuthal Anisotropy and Two-pion Emission Source Radii in p+p,p+A, d+A and A+A Collisions (126) 83.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Relative polarization of Lambda hyperon pairs in the SELEX experiment (127) 84.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Renormdynamics and Hadronization (128) 85.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Energy scan of correlations in p+p and Be+Be from NA61/SHINE (129) 86.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fluctuations in Strong-Coupling Heavy Quark Energy Loss (130) 87.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

pQCD short path length corrections to (D)GLV energy loss in the QGP (133) 88.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hadron resonances in the medium via electromagnetic probes (134) 89.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

High statistics measurements of azimuthal flows in Au+Au collisions at sqrt{s_{NN}} = 2.4 GeV (135) 90.. . . . . . . . . .

Production of Multi-Strange hyperons at FAIR energies (136) 91.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Energy dependence of fluctuations in p+p and Be+Be collisions from NA61/SHINE. (137) 92.. . . . . . . . . . . . . . . . . . . . . . . . .

Search of strangelets and “forward” physics on the collider (138) 93.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Study on initial geometry fluctuations via correlation of finite distributions of secondary particles innucleus-nucleus interactions (140) 95.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

On the pair correlations of neutral K, D, B and B_s mesons with close momenta produced in inclusivemultiparticle processes (141) 96.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hadroproduction of varphi-mesons in the Quark-Gluon String model (142) 98.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strangeness evolution at FAIR energies (143) 99.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Features of triangular flow of strange and non-strange hadrons at LHC (144) 100.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Particle correlators and possible local parity violation in nuclear collisions (145) 101.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Forward-backward correlations with strange particles in PYTHIA event generator (146) 102.. . . . . . . . . . . . . . . . . . . . . . . . . . .

Dynamical upsilon-suppression in the stochastic-Schroedinger approach (147) 103.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Possible effect of mixed phase and deconfinement upon spin correlations in the $\Lambda \bar{\Lambda}$pairs generated in relativistic heavy-ion collisions (148) 104.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Towards the quark-gluonic Equation of State including strange and charmed quarks with realistic masses(149) 106.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hyperon production in heavy ion collisions. The role of initial state in "horn"-effect (151) 107.. . . . . . . . . . . . . . . . . . . . . . . . .

Thermodynamics of QCD based modified gravity (152) 108.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A quantum chromodynamics based reconstruction scheme for f(T) gravity in flat FRW universe (153) 110.. . . . . . . . .

QGP away from thermal saturation and gluon condensation (154) 112.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Tracing back the QCD equation of state (155) 113.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transport study on heavy quarkonium production in heavy ion collisions (156) 114.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

The relevance of the ATLAS experience and its relevance to the data acquisition of the BM@N experiment atthe NICA complex (157) 115.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Dedicated Vertex Detector For Open Charm in NA61/SHINE at CERN SPS (158) 116.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Quantum transport in the framework of deformation quantization (159) 118.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Towards a general purpose ARM-based processing unit for high data throughput signal processing in highenergy physics (160) 120.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strange meson-baryon interaction in a hot and dense medium: recent progress for a road to GSI/FAIR (161) 121..

Multiplicity Distributions in Heavy Ion Collisions (162) 122.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Multiplicity Fluctuations in Heavy Ion Collisions (163) 124.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Beam Energy Scan of Specific Heat through Temperature Fluctuations (164) 126.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Jet-induced modifications of the characteristic of the bulk nuclear matter (165) 128.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Thermalization of hadrons through Hagedorn states (167) 129.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CMS results on heavy flavours and quarkonia (168) 130.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hydrodynamic helicity amd strange hyperons polarization in Heavy-Ion Collisions (169) 131.. . . . . . . . . . . . . . . . . . . . . . . . .

Charm in nuclear matter (174) 132.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transport coefficients and quark-hadron phase transition from PLSM in vanishing and finite magnetic field(175) 133.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Heavy mesons in hadronic medium: interaction and transport coefficients (176) 134.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Baryon stopping signal for mixed phase formation in HIC (178) 135.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Production of Vector Mesons in Ultra-Peripheral Pb-Pb Interactions with ALICE (180) 136.. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Prospects of elliptic flow studies at NICA/MPD (188) 137.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hard parton production in the quark-gluon plasma (189) 138.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Heavy flavor in heavy-ion collisions (190) 139.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

The hyperon puzzle in the neutron star EoS (191) 140.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Prospects for the dense baryonic matter research at NICA (192) 141.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Overview of ALICE results (193) 142.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A new approach to detect hypernuclei in the QMD/HSD phase space distribution at relativistic energies (194) 143

Lattice-QCD Studies of the H-Dibaryon (195) 144.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iv

Flow of strange and charged particles in pp, pPb and PbPb collisions (196) 145.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Correlations and flavors in jets in ALICE (197) 146.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

The ALICE Upgrade programme (198) 147.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STAR results on strangeness production and properties of sQGP (199) 149.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hadron production at SIS energies: an update from HADES (200) 150.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Theory status of quarkonium production in proton-nucleus collisions (201) 151.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

In-medium heavy quarkonium from lattice QCD spectral functions (202) 152.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Hyper nucleus production in heavy ion collision experiments (204) 154.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Strangeness and light flavor production with ALICE (205) 155.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Study of Hyperon Interaction via Heavy-Ion Collisions from STAR Collaboration (206) 156.. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Relativistic Electro-Magneto-Fluid Dynamics (207) 157.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Approaches to QCD phase diagram; effective models, strong coupling lattice QCD, and compact stars (208) 158..

STUDYING QUARK CONDENSATES WITHIN MODELS OF FOUR-QUARK INTERACTIONS (209) 160.. . . . . . . . . .

Heavy flavor transport (210) 161.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Heavy flavor (open and hidden) production and properties of sQGP at top energies (211) 162.. . . . . . . . . . . . . . . . . . . . . . . . . .

Charmonium results in p-Pb and Pb-Pb collisions from ALICE (212) 163.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

QCD Hadronization and the Statistical Model (213) 164.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Investigation of Hypernuclei with Nuclotron Beams (214) 166.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Fluctuation effects on the quark matter under strong magnetic field (215) 167.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Cosmological Implications of Strange Quark Matter, hint of Cold Dark Matter (216) 168.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Inhomogeneous chiral symmetry breaking in compact stellar matter (217) 169.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Matching Hagedorn mass spectrum to Lattice QCD (218) 170.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

HOW WAS THE FINE-STRUCTURE CONSTANT INCONSTANT? (219) 171.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

LATTICE QCD WITH NONZERO CHIRAL DENSITY (220) 172.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

NUCLEUS PROBING FOR SHORT-RANGE CORRELATIONS (SRC) USING NEUTRINO-NUCLEONINTERACTIONS. (221) 173.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MAKING A SOFT EOS HARD WITHIN RMF MODELS (222) 174.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PHASE DIAGRAM IN ENTAGLEMENT PNJL MODEL (223) 175.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CONFORMAL EFFECTS IN SUPERGRAVITY: BACKREACTED DIRAC DELTA SOURCES (224) 176.. . . . . . . . . . . . . .

TOPOLOGICAL SUSCEPTIBILITY FROM N_F= 2+1+1 FLAVOUR QCD AT NONZERO TEMPERATURE (225) 177

RADIATION TOLERANCE OF MICROSTRIP SENSORS FOR THE CBM (226) 178.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OUR UNDERSTANDING ON LANDAU-RAYCHAUDHURI COSMOLOGY (227) 179.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

IMPORTANCE OF DIFFERENT ENERGY LOSS EFFECTS IN JET SUPPRESSION AT RHIC AND LHC (228) 180.

HYDRODYNAMIC MODELLING OF QGP EXPANSION USING AN EXACT SOLUTION OF RIEMANNPROBLEM (229) 182.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

v

FLOW VISCOSITY WITH A RUNNING COUPLING (230) 183.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AZIMUTHAL ANISOTROPY OF Φ-MESON IN U+U AND AU+AU COLLISIONS AT RHIC (231) 184.. . . . . . . . . . . . . .

THE QUESTION OF EXISTENCE OF THIRD FAMILY OF COMPACT STARS (232) 185.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

GENERATION OF HIGHER FLOW HARMONICS IN PB+PB COLLISIONS AT LHC IN HYDJET++ MODEL(233) 186.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FLAVOR HIERARCHY IN FREEZEOUT (234) 187.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

DIRECTED FLOW IN HEAVY-ION COLLISIONS FROM PHSD TRANSPORT APPROACH (235) 188.. . . . . . . . . . . . . . .

Entropic and enthalpic phase transitions in high energy density nuclear matter (236) 189.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

vi

Abstract ID : 0

Thermal and non-thermal charmedmeson production in heavy ions

collisions at the LHCContent :

Studying the charmed hadron production is a particularly useful tool to probe properties of hot and dense matter createdin relativistic heavy ion collisions, and to extract the information about mechanisms of in-medium heavy quarkthermalization. In this report, the phenomenological analysis of the LHC data on momentum spectra and elliptic flow ofcharmed hadrons (J/Psi and D mesons) in PbPb collisions at the center-of-mass energy 2.76 TeV per nucleon pair has beendone in the frameworks of two-component HYDJET++ model. Among other heavy ion event generators, HYDJET++focuses on the detailed simulation of jet quenching effect taking into account medium-induced radiative and collisionalpartonic energy loss (hard "non-thermal" component), and also reproducing the main features of nuclear collectivedynamics by the parametrization of relativistic hydrodynamics with preset freeze-out conditions (soft "thermal"component). The charmed meson production pattern in PbPb collisions at the LHC is reproduced by HYDJET++simulations, and agrees with the high degree of c-quark thermalization in quark-gluon plasma.

Primary authors : Dr. LOKHTIN, Igor (Skobeltsyn Institute of Nuclear Physics, LomonosovMoscow State University)

Co-authors : Dr. EYYUBOVA, Gyulnara (Skobeltsyn Institute of Nuclear Physics, LomonosovMoscow State University) ; Mr. BELYAEV, Andrey (Skobeltsyn Institute of Nuclear Physics,Lomonosov Moscow State University) ; Mrs. PRONINA, Elizaveta (Lomonosov MoscowState University, Physics Department) ; Mr. PONIMATKIN, Georgy (Czech TechnicalUniversity in Prague, Faculty of Nuclear Sciences and Physical Engineering)

Presenter : Dr. LOKHTIN, Igor (Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University)

Track classification : Heavy flavor production and transport (R. Rapp, Texas A&M; / H. Van Hees,Frankfurt) ; Freezeout, Hadronization and Statistical Model (F. Becattini,Florence / R. Stock, Frankfurt)

Contribution type : I am interested in giving a talk at the parallel session

Submitted by : Dr. LOKHTIN, Igor

Submitted on Wednesday 04 March 2015

Last modified on : Thursday 16 April 2015

Comments :

Status : SUBMITTED

Track judgments :

Track : Heavy flavor production and transport (R. Rapp, Texas A&M; / H. Van Hees, Frankfurt)

Judgment :

Track : Freezeout, Hadronization and Statistical Model (F. Becattini, Florence / R. Stock, Frankfurt)

STRANGENESS IN QUARK MATTER 2... / Abstracts book Thermal and non-thermal charmed meson production i...

Page 1 Sunday 05 July 2015

Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Thermal and non-thermal charmed meson production i...


Abstract ID : 1

Centrality dependence of elliptic flow ofmulti-strange hadrons in Au+Au

collisions at sqrt(s_{NN} = 200 GeVContent :

We will present recent results of the mid-rapidity elliptic flow ($v_2$) for multi-strange hadrons ($\phi$, $\Cascade$ and$\Omega$) as a function of centrality in Au + Au collisions at the center of mass energy $\sqrt{s_{NN}}$ = 200 GeV. Thetransverse momentum dependence of $\phi$ and $\Omega$ $v_2$ is similar to that of pion and proton, indicating that theheavier strange (s) quark flows as strongly as the lighter up (u) and down (d) quarks. Number-of-Constituent Quark(NCQ) scaling is found to hold within statistical uncertainty for both 0-30% and 30-80% collision centralities. Theseobservations constitute a clear piece of evidence for the development of partonic collectivity in heavy-ion collisions at thetop RHIC energy. In addition, the mass ordering of $v_2$ breaks between the $\phi$ and proton at low transversemomentum in the 0-30% centrality bin, possibly due to the effect of late hadronic interactions on the proton $v_2$.

Primary authors : Dr. SHI, Shusu (Central China Normal University)

Co-authors :

Presenter : Dr. SHI, Shusu (Central China Normal University)

Track classification : Freezeout, Hadronization and Statistical Model (F. Becattini, Florence / R.Stock, Frankfurt)


Submitted by : Dr. SHI, Shusu

Submitted on Saturday 07 March 2015

Last modified on : Saturday 04 July 2015

Comments :for the STAR collaboration

Status : SUBMITTED

Track judgments :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Centrality dependence of elliptic flow of multi-st...


Abstract ID : 3

EVOLUTION OF QUARK-GLUONPLASMA AND QUARK-HADRON

PHASE TRANSITIONContent :

We study the effect of thermal quark mass in the free energy evolution of a quark-gluon plasma using simple statisticalmodel after incorporating the curvature term. In this study, the thermal quark mass is dependent on parametrization factorand temperature. Also a thermodynamic variable like entropy and specific heat show a nature of phase transition. Theresults are found to produce significant improvements over earlier results.

Primary authors : Dr. KUMAR, Yogesh (Sri Aurobindo College)

Co-authors : Dr. SINGH, S. Somorendro (University of Delhi)

Presenter : Dr. KUMAR, Yogesh (Sri Aurobindo College)

Track classification : Scientific Programme

Contribution type : I am interested in presenting a poster

Submitted by : Dr. KUMAR, Yogesh

Submitted on Sunday 08 March 2015

Last modified on : Sunday 08 March 2015

Comments :

Status : SUBMITTED

Track judgments :

Track : Scientific Programme

Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts bookEVOLUTION OF QUARK-GLUON PLASMA AND QUARK-HADRON P...


Abstract ID : 4

Semi-Analytical RelativisticHard-Scattering Integral for Heavy

Quark ProductionContent :

Analytical approximate relativistic hard-scattering integrals fornucleon-nucleon collisions obtained previously were carried out forlight hadron production with the assumption of massless partons [1-3].They provide useful tools to examine the power indices and otherfeatures of the transverse spectra for jet and hadron productions atcentral rapidity in pp collisions at LHC [2-3]. We generalize herethese results of approximate hard-scattering integrals to the case ofmassive partons, for their applications to heavy quark production.The effects of screening and other non-perturbative final-stateeffects [4] associated with these relativistic hard-scatteringprocesses will be discussed.

[1] C. Y. Wong, H. Wang, Phys. Rev. C58, 376 (1998).[2] C. Y. Wong, G. Wilk, Phys. Rev. D87, 114007 (2013).[3] C. Y. Wong, G. Wilk, L.J.L. Cirto, C. Tsallis, arxiv:1402.0474 (2014).[4] C. Y. Wong, L. Chatterjee, Z. Phys. 75, 523 (1997).

Primary authors : WONG, Cheuk-yin (Oak Ridge National Laboratory)

Co-authors :

Presenter : WONG, Cheuk-yin (Oak Ridge National Laboratory)

Track classification :


Submitted by : WONG, Cheuk-yin

Submitted on Thursday 12 March 2015

Last modified on : Thursday 12 March 2015

Comments :

Status : SUBMITTED

Track judgments :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Semi-Analytical Relativistic Hard-Scattering Integ...


Abstract ID : 5

Can hot interacting hadrons become a“perfect” fluid?

Content :

The ratio $\eta/s$ of the shear viscosity, $\eta$, and the entropy density, s, of hot interacting hadrons is calculated usingthe Chapman-Enskog and virial expansion methods. Interactions are parametrizedusing the K-matrix which preserves the unitarity of the S-matrix. In the four component mixture $\pi-K-\eta-N$ , 57resonances up to 2 GeV are included. Increasing number of resonances is shown toreduce $\eta$ and increase s resulting in a progressive decrease of $\eta/s$ for temperatures close to the QCDphase transition temperature. Prospects of hot hadrons becoming a “perfect” fluid are discussed.For a finite $\mu$ system, we study an interacting pion gas ina system of net baryon number zero. Time evolution of the temperature and pion chemical potential are taken from idealfluid hydrodynamic calculations of RHIC and LHC collisions. We find that the shear viscosity decreases whereas theentropy density increases with increasingpion chemical potential resulting in values of η/s that are slightly reduced from the case of chemical potentials being zerowhen chemical equilibrium prevails. Our results indicate thatthe inclusion of additional mesons and baryons will likely lead to further reduction in the valueof η/s.

Primary authors : Dr. WIRANATA, Anton (Ohio University)

Co-authors :

Presenter : Dr. WIRANATA, Anton (Ohio University)



Submitted by : Dr. WIRANATA, Anton

Submitted on Saturday 14 March 2015

Last modified on : Saturday 14 March 2015

Comments :

Status : SUBMITTED

Track judgments :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Can hot interacting hadrons become a “perfect” flu...


Abstract ID : 7

eccentricity evolution in relativisticheavy ion collisions

Content :

High energy nulcear experiments at RHIC and LHC have collected many data on the production of hadrons andelectromagnetic probes. A consistent understanding those data is needed. However the anisotropic emission of directphotons and thermal dileptons from relativistic heavy ion collisions seems hard to be understood consistently with that ofhadrons. We will present the production of direct phtons, dileptons and hadrons from AuAu collisions at 200GeV with ahydrodynamic model based on event generator EPOS, and try to interpret how the evolution of eccentricity play a role inthis issue.

Primary authors : Ms. LIU, Fuming (CCNU)

Co-authors : Prof. WERNER, Klaus (Subatech.in2p3.fr) ; Mr. LIU, Shengxu (CCNU) ; Mr. YUE,Meng (CCNU)

Presenter : Ms. LIU, Fuming (CCNU)



Submitted by : Ms. LIU, Fuming

Submitted on Tuesday 17 March 2015

Last modified on : Tuesday 17 March 2015

Comments :

Status : SUBMITTED

Track judgments :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book eccentricity evolution in relativistic heavy ion c...


Abstract ID : 8

Description of High-Energy ppCollisions Using Tsallis

Thermodynamics: TransverseMomentum and Rapidity Distributions

Content :

\begin{abstract}A systematic analysis of transverse momentum and rapidity distributions measured inhigh-energy proton - proton (pp) collisions for energies ranging from 53 GeV to 7 TeV using Tsallis thermodynamics ispresented.The excellent description of all transverse momentum spectra obtained in earlier analyses is confirmed and extended.All energies can be described by a single Tsallis temperature of 68 $\pm$ 5 MeV at all beam energies and particle typesinvestigated (43 in total).The value of the entropic index, q, shows a wider spread but is always close to q $\approx$ 1.146. These values are thenusedto describe the rapidity distributions using a superposition of two Tsallis fireballs along the rapidity axis.

It is concluded that the hadronic system created in high-energy p - p collisions between 53 GeV and 7 TeVcan be seen as obeying Tsallis thermodynamics.

Summary :

Description of Rapidity distributions using the Tsallis distribution

Primary authors : Mr. MARQUES, Lucas (Instituto de F\'isica, Universidade de S\~ao Paulo -IFUSP, Rua do Mat\~ao, Travessa R 187, 05508-900 Sao Paulo-SP, Brazil)

Co-authors : Prof. CLEYMANS, Jean (University of Cape Town) ; Prof. DEPPMAN, Airton(Instituto de F\'isica, Universidade de S\~ao Paulo - IFUSP, Rua do Mat\~ao, Travessa R187, 05508-900 S\~ao Paulo-SP, Brazil)

Presenter : Prof. CLEYMANS, Jean (University of Cape Town)



Submitted by : Prof. CLEYMANS, Jean



Comments :

Status : SUBMITTED

Track judgments :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Description of High-Energy pp Collisions Using Tsa...



Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Description of High-Energy pp Collisions Using Tsa...


Abstract ID : 9

The Tsallis Distribution at LargeTransverse Momenta

Content :

Fits to the transverse momentum distributions of charged particles produced in $p - p$ collisions atLHC energies based on the Tsallis distribution have been shown to work over 14 orders of magnitude.Two versions of the Tsallis distribution are compared and discussed, the thermodynamically consistentversion leads to a temperature of $T = 74 \pm 13 $ MeV at the highest beam energy, a result which is inagreement with previous analyses done with lower transverse momentum data.

Primary authors : Prof. CLEYMANS, Jean (University of Cape Town)

Co-authors : Dr. AZMI, M. Danish (HEP Lab, Department of Physics, Aligarh Muslim University,Aligarh - 202002, India)

Presenter : Prof. CLEYMANS, Jean (University of Cape Town)



Submitted by : Prof. CLEYMANS, Jean



Comments :

Status : SUBMITTED

Track judgments :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book The Tsallis Distribution at Large Transverse Momen...


Abstract ID : 10

Feasibility Study of Phi-meson (1020)Production at NICA/MPD

Content :

The goal of this report is to provide an overview of the MultiPurpose Detector (MPD) at NICA and to present the currentresults of the MPD performance for φ-meson production.The Nuclotron-based Ion Collider fAcility (NICA) is a new accelerator complex being constructed at JINR. The globalscientific goal of the NICA/MPD project is to explore the phase diagram of strongly interacting matter in the region ofhighly compressed baryonicmatter. The MPD detector covers a large phase space, it is functional at high interaction rates and comprises highefficiency and excellent particle identification capabilities.Measurements of the production of strange particles such as the φ-meson can provide important information on theproperties of the medium and particle production mechanisms in ultra-relativistic Au-Au collisions. The φ vector meson isthe lightest bound state of hidden strangeness, consisting of a quark-antiquark pair. The φ-meson has a very smallcross-section for interactions with non-strange hadrons. These properties make the φ-meson an excellent probe of the hotand dense medium created in nucleus-nucleus collisions at NICA/MPD.In this report methods for calculating the invariant mass of the φ-meson are presented,measurements of the combinatorialbackground and its rescaling are shown and fitting by a Breit-Wigner function is performed.In our study we use the channel decay Φ → K + K − to detect the formation of the φ-meson. UrQMD event generator isused and central events at 11 GeV are analyzed. The invariant mass of the kaon pairs is calculated and then thecombinatorial background (mixed-event technique) is subtracted. The obtained peak from the invariant mass dis-tribution is fitted by a Breit-Wigner function and the characteristics of the φ-meson such as its mass and its width arefound.

Summary :

The final results for the raw yields of the φ -meson are presented. The values of the parameters obtained by theBreit-Wigner fit are consistent with the values given in literature. All these preliminary results show that themeasurement of φ -mesons is feasible at NICA/MPD.

Primary authors : Ms. YORDANOVA, Lyubka (JINR)

Co-authors :

Presenter : Ms. YORDANOVA, Lyubka (JINR)



Submitted by : Ms. YORDANOVA, Lyubka

Submitted on Wednesday 18 March 2015

Last modified on : Wednesday 18 March 2015

Comments :

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Feasibility Study of Phi-meson (1020) Production a...


Abstract ID : 11

"A Feasibility Study of HypernucleiReconstruction at NICA/MPD"

Content :

One of the main tasks of the NICA/MPD physics program is a study of the strangeness production in nuclear collisions.Heavy strange objects could provide essential signatures of the excited and compressed baryonic matter.Study of hypernuclei is important for: understanding the strangeness degrees of freedom in hadronic systems; study of allpopulated regions in the three-dimensional chart of the nuclides; study of hyperon-nucleus and hyperon-hyperoninteractions.Monte Carlo simulation shows that the start version of the MPD detector will provide good conditions for hyperonreconstruction in Au+Au collisionsat NICA.

Primary authors : Ms. ILIEVA, Mariya (Joint Institute for Nuclear Research)

Co-authors :

Presenter : Ms. ILIEVA, Mariya (Joint Institute for Nuclear Research)



Submitted by : Ms. ILIEVA, Mariya



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STRANGENESS IN QUARK MATTER 2... / Abstracts book "A Feasibility Study of Hypernuclei Reconstruction...


Abstract ID : 12

Study of clusters and hypernucleiproduction with the NICA/MPD and

BM@N experimentsContent :

Heavy-ion collisions provide the unique possibility to create and investigate hot and dense matter in the laboratory. At theinitial stage of the reaction a QGP is formed, while the final stage is driven by the hadronization process and the formationof clusters. The capture of the produced hyperons by clusters of nucleons leads to the hypernuclei formation which is avery rare process at strangeness threshold energies.We report on the first results on the dynamical modeling of cluster formation with the combined PHSD+SACA(Parton-Hadron-Strings dynamics + Simulated Annealing Clusterization Algorithm) model at Nuclotron and NICAenergies. The clusters selection in SACA is realized by a simulated annealing procedure to obtain the most boundconfiguration of fragments and nucleons.Based on present predictions of the combined model we study the possibility to detect such clusters and hypernuclei in theBM@N and MPD/NICA detectors.

Primary authors : Mr. KIREYEU, Viktar (Joint Institute for Nuclear Research)

Co-authors :

Presenter : Mr. KIREYEU, Viktar (Joint Institute for Nuclear Research)



Submitted by : Mr. KIREYEU, Viktar



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Study of clusters and hypernuclei production with ...


Abstract ID : 16

Strange mesons in p+p, d+Au, Cu+Cuand Au+Au collisions at \sqrt{s_{NN}} =

200 GeV in PHENIX experiment atRHIC

Content :

Strongly coupled quark gluon plasma (QGP) was discovered in heavy ion collisions at Relativistic Heavy Ion Collider(RHIC). Unlike up and down quarks, strange quarks are not present in colliding nuclei and are formed in collisionsbetween constituents of the QGP. Therefore measurements of particles that contain strange quarks is an effective way tocompare with hadrons that contain only light quarks and investigate the properties of the hot and dense matter formed inheavy ion collisions. Particles with strangeness content cover a wide range of masses and include mesons and baryonswhich makes them a perfect tool to study such features of hadron production as radial flow and recombination atintermediate $p_T$ and energy loss flavor dependence at high $p_T$.

In this talk we present the latest PHENIX results on production of K$^\pm$, K$_s$, K* and $\phi$ mesons in p+p, d+Au,Cu+Cu and Au+Au collisions at \sqrt{s_{NN}} = 200 GeV. While p+p collisions provide a baseline and are used forprecision tests of pQCD calculations, for heavier colliding systems such as d+Au, C+Cu and Au+Au the nuclearmodification factors are studied at different centralities. These systematic studies enrich our understanding of the strangemeson production and their difference from light quark hadrons. The role of radial flow and coalescence in particleproduction is discussed.

Primary authors : Mr. KOTOV, Dmitry (NRC "Kurchatov Institute" B.P. Konstantinov PetersburgNuclear Physics Institute, Peter the Great St.Petersburg Polytechnic University)

Co-authors :

Presenter : Mr. KOTOV, Dmitry (NRC "Kurchatov Institute" B.P. Konstantinov Petersburg Nuclear Physics Institute, Peter the Great St.Petersburg Polytechnic University)


Contribution type : I am a plenary speaker

Submitted by : Mr. KOTOV, Dmitry

Submitted on Sunday 22 March 2015

Last modified on : Sunday 22 March 2015

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Strange mesons in p+p, d+Au, Cu+Cu and Au+Au colli...


Abstract ID : 67

Toward a understanding to the RAAand v2 puzzle for heavy quarks

Content :

The heavy quarks, charm and bottom, constitutes a unique probe of theQGP properties. Both at RHIC and LHC energies a puzzling relationbetween the nuclear modification factor R_AA(pT) and the ellipticflow v_2(p_T) related to heavy quark has been observed whichchallenged existing models. We discuss how the temperature dependenceof the heavy quark drag coefficient is responsible to address for alarge part of such a puzzle. In particular, we have considered fourdifferent models to evaluate the temperature dependence of the drag anddiffusion coefficients propagating through a quark gluon plasma (QGP).The impact of different realization of the fuctuation-dissipationtheorem will be also addressed. All the four different models are setto reproduce the same R_AA(pT) observed in experiments at RHIC and LHCenergy. We point out that for the same R_AA(pT) one can generate 2-3times more v_2 depending on the temperature dependence of the heavyquark drag coefficient. An increasing drag coefficient as Tc along withhadronization by coalescence are the major ingredients for asimultaneous description of R_AA(pT) and v_2(pT).

Primary authors : Dr. DAS, Santosh Kumar (University of Catania)

Co-authors : Dr. SCARDINA, Francesco (University of Catania) ; Dr. PLUMARI, Salvatore(University of Catania) ; Prof. GRECO, Vincenzo (University of Catania)

Presenter : Dr. DAS, Santosh Kumar (University of Catania) ; Dr. SCARDINA, Francesco (University of Catania) ; Prof. GRECO, Vincenzo (University of Catania)

Track classification : Heavy flavor production and transport (R. Rapp, Texas A&M; / H. Van Hees,Frankfurt)


Submitted by : Dr. DAS, Santosh Kumar

Submitted on Monday 23 March 2015

Last modified on : Monday 06 April 2015

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Toward a understanding to the RAA and v2 puzzle fo...


Abstract ID : 68

PHENIX Measurements of AnisotropicFlow in Heavy-Ion Collisions at RHIC

energies.Content :

The anisotropic flow coefficients $v_n$ can provide constraints crucialforprecision extraction of the specific shear viscosity eta/s, of theplasma(QGP) produced in heavy-ion collisions at RHIC. Recently a significantattention has been given to theoretical studies of $v_n$ (odd and even) andthe associated initial [fluctuating] eccentricities which drive $v_n$.Over the last years the PHENIX Collaboration has performeddetailed differential measurements of $v_n$ (odd and even) relativeto the participant event planes as a function of transversemomentum, centrality, collision system (Au+Au, Cu+Cu, Cu+Au, d+Au,He+Au), and beam energyfor different particle species. The results from thesemeasurements will be presented and discussed.Detailed comparisons to LHC data will be shown as appropriate.

Primary authors : Dr. TARANENKO, Arkadiy (National Research Nuclear University MEPhI(Moscow Engineering Physics Institute))

Co-authors :

Presenter : Dr. TARANENKO, Arkadiy (National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))



Submitted by : Dr. TARANENKO, Arkadiy



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STRANGENESS IN QUARK MATTER 2... / Abstracts book PHENIX Measurements of Anisotropic Flow in Heavy-...


Abstract ID : 69

Impact of momentum state anisotropyon heavy quark-dynamics

Content :

A rapidly expanding anisotropic hot QCD plasma is considered to set up an effective Vlasov equation to model the non(near)-equilibrium distribution functions that constitute the bulk of the hot and dense nuclear matter in heavy ioncollisions. The dynamics of the heavy quark-antiquark states while traveling in this background medium is analyzed bylooking at the drag and diffusion coefficients. In this work, we study the impact of the anisotropy on these transportcoefficients. The drag and diffusion coefficients are found to be highly influenced by the strength of the anisotropy and thelife time of the instability induced by the anisotropy (known as Chromo-Weibel instability)

Primary authors : Dr. CHANDRA, Vinod (Indian Institute of Technology Gandhinagar India)

Co-authors : Dr. DAS, Santosh Kumar (University of Catania)

Presenter : Dr. CHANDRA, Vinod (Indian Institute of Technology Gandhinagar India)



Submitted by : Dr. CHANDRA, Vinod

Submitted on Friday 27 March 2015

Last modified on : Friday 27 March 2015

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Impact of momentum state anisotropy on heavy quar...


Abstract ID : 70

Electromagnetic and strange probes ofdense nuclear matter at NICA/MPD: a

feasibility studyContent :

The main task of NICA/MPD physics program is the study of theproperties of nuclear matter under extreme conditions achieved in collisions of heavy ions. These properties can revealthemselves through different probes, the most promising among those being the lepton-antilepton pairs and strangehadrons.In this talk the MPD performance for measuring the electron-positron pairs and strange particles ($\Lambda$, $\Xi^-$ and$\Omega^-$ hyperons and their antiparticles$\bar{\Lambda}$, $\bar{\Xi}^+$ and $\bar{\Omega}^+$ as well as hypernuclei $^3_\Lambda$H) in central Au+Au collisionsat NICA energies will be presented.

Primary authors : Dr. ZINCHENKO, Alexander (VBLHEP, JINR)

Co-authors : Ms. VASENDINA, Veronika (VBLHEP, JINR) ; ■-■. KOLESNIKOV, Vadim (VBLHEP,JINR)

Presenter : Dr. ZINCHENKO, Alexander (VBLHEP, JINR)

Track classification : Strangeness production (B. Mueller, Duke / H. Stoecker, Frankfurt & GSI )


Submitted by : Dr. ZINCHENKO, Alexander

Submitted on Monday 30 March 2015


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Status : SUBMITTED

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Track : Strangeness production (B. Mueller, Duke / H. Stoecker, Frankfurt & GSI )

Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Electromagnetic and strange probes of dense nuclea...


Abstract ID : 71

A Feasibility Study of HyperonReconstruction in Au-Au collisions at

NICAContent :

Abstract

Heavy strange objects (hyperons) could provide essential signaturesof the excited and compressed baryonic matter. Their reconstruction and identification should be one of the mostimportant tasks of any experiment with heavy ions.At NICA, it is planned to study hyperons both in the collider mode(MPD detector) and the fixed-target one (BM@N setup).The results on $\Lambda$ and $\Xi^-$ hyperon reconstruction in Monte Carlo simulated event samples of gold-goldcollisions with the BM@N detector will be presented.

Primary authors : Ms. SUVARIEVA, Dilyana (JINR)

Co-authors :

Presenter : Ms. SUVARIEVA, Dilyana (JINR)



Submitted by : Ms. SUVARIEVA, Dilyana



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STRANGENESS IN QUARK MATTER 2... / Abstracts book A Feasibility Study of Hyperon Reconstruction in A...


Abstract ID : 72

Beam Energy Scan using a viscoushydro+cascade model

Content :

Hybrid approaches based on relativistic hydrodynamics and transport theory have been successfully applied for manyyears for the dynamical description of heavy ion collisions at ultrarelativistic energies. In this talk a new viscous hybridmodel employing the hadron transport approach UrQMD for the early and late non-equilibrium stages of the reaction, and3+1 dimensional viscous hydrodynamics for the hot and dense quark-gluon plasma stage is discussed. This approachincludes the equation of motion for finite baryon number, and employs an equation of state with finite net-baryon densityto allow for calculations in a large range of beam energies. The parameter space of the model is explored, and constrainedby comparison with the experimental data for bulk observables from SPS and the phase I beam energy scan at RHIC. Thefavored parameter values depend on energy, but allow to extract the effective value of the shear viscosity coefficient overentropy density ratio $\eta/s$ in the fluid phase for the whole energy region under investigation. The estimated value of$\eta/s$ increases with decreasing collision energy, which may indicate that $\eta/s$ of the quark-gluon plasma dependson baryochemical potential $\mu_B$.

Primary authors : Dr. KARPENKO, Iurii (Frankfurt Institute for Advanced Studies)

Co-authors : Prof. PETERSEN, Hannah (Frankfurt Institute for Advanced Studies) ; Dr.HUOVINEN, Pasi (Institut für Theoretische Physik, Goether Univ.) ; Prof. BLEICHER,Marcus (Frankfurt Institute for Advanced Studies)

Presenter : Dr. KARPENKO, Iurii (Frankfurt Institute for Advanced Studies)

Track classification : Beam energy scan programs (Nu Xu, Berkeley / M. Gazdzicki, Frankfurt &Kielce)


Submitted by : Dr. KARPENKO, Iurii

Submitted on Friday 03 April 2015


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Status : SUBMITTED

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Track : Beam energy scan programs (Nu Xu, Berkeley / M. Gazdzicki, Frankfurt & Kielce)

Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Beam Energy Scan using a viscous hydro+cascade mod...


Abstract ID : 73

Bose-Einstein correlations of chargedkaons in $p+p$ collisions measured

with the STAR detectorContent :

We report the results of two-kaon Bose-Einstein correlations measured inpp collisions at 200 and 510 GeV with the STAR detector at RHIC. Theone-dimensional correlation functions are studied as a function ofdifferent transverse pair momentum intervals, $k_T$, and chargedparticle multiplicities, $N_ch$, of the event. The femtoscopicparameters $R_{inv}$ and $\lambda$ are extracted. The dependence of thesource radii and the correlation strengths on multiplicity andtransverse pair momentum is investigated.

Primary authors : Mr. NIGMATKULOV, Grigory (National Research Nuclear University MEPhI(Moscow Engineering Physics Institute))

Co-authors :

Presenter : Mr. NIGMATKULOV, Grigory (National Research Nuclear University MEPhI (Moscow Engineering Physics Institute))

Track classification : Hadron resonances in the sQGP (C. Markert, UT Austin / C. Ratti, Houston &Turin) ; Heavy flavor production and transport (R. Rapp, Texas A&M; / H. VanHees, Frankfurt) ; Freezeout, Hadronization and Statistical Model (F. Becattini,Florence / R. Stock, Frankfurt) ; Strangeness in Astrophysics (H.-J. Schulze,Catania / J. Schaffner-Bielich, Frankfurt) ; Strangeness production (B. Mueller,Duke / H. Stoecker, Frankfurt & GSI ) ; Beam energy scan programs (Nu Xu,Berkeley / M. Gazdzicki, Frankfurt & Kielce)


Submitted by : Mr. NIGMATKULOV, Grigory

Submitted on Monday 06 April 2015

Last modified on : Wednesday 22 April 2015

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Status : SUBMITTED

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Track : Hadron resonances in the sQGP (C. Markert, UT Austin / C. Ratti, Houston & Turin)

Judgment :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Bose-Einstein correlations of charged kaons in $p+...



Judgment :

Track : Strangeness in Astrophysics (H.-J. Schulze, Catania / J. Schaffner-Bielich, Frankfurt)

Judgment :


Judgment :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Bose-Einstein correlations of charged kaons in $p+...


Abstract ID : 74

Correlations and fluctuations in largeand small systems

Content :

In this talk I will present our recent work on correlation and fluctuations in large and small systems, which mainly coversthe following aspects.

1) Using UrQMD hadron cascade model, we systematically study the azimuthal correlations in p-Pb collisions at 5.02 TeV.Our calculation show that pure hadronic interactions could not generated a strong collective expansion as indicated by theflow data, but could produce a $v_2$ mass-ordering patten in the high multiplicity events, that is similar to the oneobserved in experiments

2) We predict the azimuthal correlations in 13 TeV p+p collisions, using UrQMD and VISHNU hybrid model.

3) We introduce a dynamical model near the critical point for the RHIC Beam Energy Scan (BEC) program with anemphasis on the correlated fluctuations along the freeze-out surface and then discuss the related experimental observables.

Primary authors : Prof. SONG, Huichao (Peking U)

Co-authors :

Presenter : Prof. SONG, Huichao (Peking U)

Track classification : Scientific Programme ; Beam energy scan programs (Nu Xu, Berkeley / M.Gazdzicki, Frankfurt & Kielce)


Submitted by : HUICHAO, Song

Submitted on Tuesday 07 April 2015

Last modified on : Tuesday 07 April 2015

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Status : SUBMITTED

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Judgment :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Correlations and fluctuations in large and small s...


Abstract ID : 75

Strange and multi-strange hadrons inheavy-ion collisions with a hybrid

approachContent :

It is generally believed that multi-strange hadrons, such as $\Xi$ and $\Omega$, directly carry the information of the QGPphase because of their small hadronic cross sections and the associated early decouplings from the system near $T_{c}$. Inthis talk, we will show our recent {\tt VISHNU} hybrid model calculations on yields, spectra, and flow of strange andmulti-strange hadrons, and discuss chemical and thermal freeze-out of various hadrons species in Pb+Pb collisionsat $\sqrt{s_{NN}}$ = 2.76 TeV. We also extend our calculations for the soft hadron data for common, strange, andmulti-strange hadrons at the Beam Energy Scan and explore the energy dependence of the specific QGP shear viscosity$(\eta/s)_{QGP}$.

Primary authors : Dr. ZHU, Xiangrong (Peking University)

Co-authors : Prof. SONG, Huichao (Peking University) ; Prof. LIU, Yuxin (Peking University) ; Mr.MENG, Fanli (Peking University)

Presenter : Dr. ZHU, Xiangrong (Peking University)



Submitted by : Dr. ZHU, Xiangrong



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Status : SUBMITTED

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Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Strange and multi-strange hadrons in heavy-ion col...


Abstract ID : 76

Two-particle correlation measurementsin p+Nb reactions at sqrt(sNN) = 3.18

GeVContent :

In nature we have a realization of three quark generations whereas the main part of the matter is made out of the firstquark generation, which contains the up and down quark. Nevertheless, many recent calculations claim that also thestrange quark could play an important role in the interior of neutron stars, where they show up either in the form ofdeconfined strange quark matter or more likely bound in hyperons. However, the appearance of hyperons causes sometrouble because such additional heavy degrees of freedom leads usually to a too soft equation of state, and modelsincluding them cannot reproduce a recent neutron star measurement of two solar masses. This means that either thehyperon hypothesis is ruled out or the hyperon-nucleon interaction is too poorly modeled. For the last option speaks thatexperimental data for the hyperon-nucleon interaction is very scarce in comparison, for example, to the very precise phaseshift measurements in the nucleon-nucleon case.

With the High Acceptance Di-Electron Spectrometer (HADES) located at GSI Helmholtzzentrum fürSchwerionenforschung at the SIS18 accelerator, various systems were studied and results obtained dealing withstrangeness physics. We are focusing on a measurement of proton niobium reactions (p+Nb) where the proton had akinetic energy of 3.5 GeV. In this system we investigated two-particle correlations which we used to extract thespatio-temporal extent of the particle emitting source using particle pairs, where the interaction is well established: pionsand protons. Knowing the source size from these measurements together with transport simulations we are able to studythe correlation function of Lambda-hyperons with protons. This gives us the possibility to explore the interaction of theLambda-hyperon and the proton with an extraction of an effective scattering length which characterises the strength ofthe interaction and helps to understand better the Lambda-nucleon interaction.

Primary authors : Mr. ARNOLD, Oliver (Physik Department E12, Technische Universit ■at M■unchen, James-Franck-Str. 1, 85748 Garching, Germany)

Co-authors :

Presenter : Mr. ARNOLD, Oliver (Physik Department E12, Technische Universit ̈at M ̈unchen, James-Franck-Str. 1, 85748 Garching, Germany)



Submitted by : Mr. ARNOLD, Oliver



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Status : SUBMITTED

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Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Two-particle correlation measurements in p+Nb reac...


Abstract ID : 77

Electrical Conductivity of an anisotropicQGP

Content :

The study of transport coefficients of strongly interacting matter got impetus after the discovery of perfect fluid evercreated at ultrarelativistic heavy ion collision experiments. We have calculated one such coefficient viz. electricalconductivity of the quark gluon plasma (QGP) phase which exhibits a momentum anisotropy. To obtain the electricalconductivity, we have solved the Relativistic Boltzmann’s kinetic equation in the relaxation-time approximation by usingthe quasiparticle description. We have comparedour model results with the corresponding results obtained in different lattice as well as other model calculations.

Summary :

We have studied the behaviour of electricalconductivity for QGP phase in the framework of relativisticBoltzmann's kinetic equation. We have solved RBT equation usingrelaxation time approximation. In this work we describe the QGPas a system of quasiparticles having temperature and chemicalpotential dependent mass along with their rest masses. Firstlywe derive the expression to calculate $\sigma$ in an isotropic medium.Later a momentum anisotropy in the distribution function of quarks andanti-quarks has been introduced and taking the leading ordercontribution in ditribution function we have obtained the $\sigma$in an anisotropic medium which is equal to the $\sigma_{iso}$ minusthe correction factor due to momentum anisotropy. We have plotted$\sigma_{aniso}/T$ for different values of $\xi$ (anisotropi parameter)which is equal to$0.0,~0.3$ and $0.6$. We have compared our model results with thecorresponding results obtained in various lattice results and founda reasonable agreement between them for certain value of $\xi$.

Primary authors : Dr. SRIVASTAVA, P. K. (Indian Institute of Technology Roorkee)

Co-authors : Ms. THAKUR, Lata (Indian Institute of Technology Roorkee) ; Dr. PATRA, B. K.(Indian Institute of Technology Roorkee)

Presenter : Ms. THAKUR, Lata (Indian Institute of Technology Roorkee)



Submitted by : Ms. THAKUR, Lata



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Status : SUBMITTED

Track judgments :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Electrical Conductivity of an anisotropic QGP



Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Electrical Conductivity of an anisotropic QGP


Abstract ID : 78

Reference calculations for subthresholdXi production

Content :

We calculate the expectations for Xi production in nuclear collisions at subthreshold energies. The total production ofstrange particles is fixed by the observed kaon abundance and we take into account that Xi’s are produced only in eventswith two or more strange quarks. Strange quarks are then distributed into various species according to equilibriumdistribution and volume selection via centrality trigger is also taken into account. The latter is shown to decrease theexpected Xi yield. We present considerations about possible production channels that could be dominant sources of Xi’s incase on non-equlibrium kinetic production.

Primary authors : TOMASIK, Boris (Univerzita Mateja Bela)

Co-authors : Dr. KOLOMEITSEV, Evgeni (Univerzita Mateja Bela) ; VOSKRESENSKY, Dmitry(Moscow Engineering Physics Institute)

Presenter : TOMASIK, Boris (Univerzita Mateja Bela)

Track classification : Freezeout, Hadronization and Statistical Model (F. Becattini, Florence / R.Stock, Frankfurt) ; Strangeness production (B. Mueller, Duke / H. Stoecker,Frankfurt & GSI )


Submitted by : TOMASIK, Boris

Submitted on Wednesday 08 April 2015


Comments :

Status : SUBMITTED

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Judgment :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Reference calculations for subthreshold Xi product...


Abstract ID : 79

Correlations between elliptic flow andidentified hadron spectra in Pb-Pb

collisions explored by ALICE via eventshape engineering

Content :

Event-by-event fluctuations in the initial geometry of the system created in nucleus-nucleus collisions are very large:events with a similar system size can develop different flow patterns during the collective expansion. A precisecharacterization of these events will give access to finer and more differential correlation measurements, with the potentialto further constrain models of initial conditions and transport coefficients of the medium. The ellipticity of the events canbe selected using the Event Shape Engineering (ESE) technique [1], based on the azimuthal distribution of producedparticles (using the so-called "flow vector"). Recent Monte-Carlo simulations [2] show a strong correlation between the(final state) event shape selection and the (initial state) eccentricity of the collision. This opens the opportunity tocharacterize events according to the initial geometry. For shape-selected events, the elliptic flow coefficient (v2) issignificantly different with respect to the unbiased events.In this study the event shape selection was used to investigate the correlation between elliptic and radial flow in Pb-Pbcollisions at sqrt(sNN) = 2.76 TeV, improving our understanding of the event-shape fluctuations and the collectiveexpansion dynamics.The approach used to select the eccentricity of the event with the ESE will be presented, as well as the effect of thisselection on identified particle spectra and the charged particle elliptic flow coefficient v2, measured with ALICE at theLHC.

References[1] Schukraft J. et al. 2013 Phys. Lett. B 719 394-98[2] Huo P. et al. 2014 Phys. Rev. C 90 024910

Primary authors : M.A., Tangaro (Univ. and INFN Bari)

Co-authors :

Presenter : M.A., Tangaro (Univ. and INFN Bari)



Submitted by : Prof. VERCELLIN, Ermanno


Last modified on : Tuesday 12 May 2015

Comments :Abstract centrally submitted by the ALICE Conference Committee; the actual presenterwill be defined later.

Status : SUBMITTED

STRANGENESS IN QUARK MATTER 2... / Abstracts book Correlations between elliptic flow and identified ...


Track judgments :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Correlations between elliptic flow and identified ...


Abstract ID : 80

Bose–Einstein correlations of chargedand neutral kaons in pp and Pb-Pb

collisions at the LHC with the ALICEexperiment

Content :

Due to the effects of quantum statistics and final state interactions, the momentum correlations of two or more particles atsmall relative velocities, i.e. at small relative momenta in their center-of-mass system, are sensitive to the space-timecharacteristics of the production processes on the level of fm = 10^−15 m. Kaons are the perfect tool to study Bose-Einsteincorrelations due to the fact that kaons are less influenced by resonance decays and therefore more effectively probedirectly produced particles.In conjunction with femtoscopic measurements of pions and protons, they can also reveal properties of collectivedynamics in heavy-ion collisions. We report on the results of Bose–Einstein correlations of charged and neutral kaons inpp collisions at sqrt(s) = 7 TeV and in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV by the ALICE experiment at the LHC. Theresults are compared to existing data from Bose-Einstein correlations of identical pions at LHC energies, and of kaons indifferent collision systems. A comparison of experimental data to theoretical expectations will be carried out.

Primary authors : K., Mikhaylov (ITEP)

Co-authors :

Presenter : K., Mikhaylov (ITEP)







Status : SUBMITTED

Track judgments :


Judgment :


STRANGENESS IN QUARK MATTER 2... / Abstracts book Bose–Einstein correlations of charged and neutral ...


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Bose–Einstein correlations of charged and neutral ...


Abstract ID : 81

Recent results on two-particle angularcorrelations in ALICE

Content :

Two-particle correlations in azimuthal angle and pseudorapidity have been used to study several important features of thedynamics in heavy ion collisions, including hydrodynamic flow and medium-induced jet modification. Furthermore, thesecorrelation studies have yielded surprising results in small collision systems, such as the presence of correlations at largerelative pseudorapidity (the 'ridge') in high-multiplicity pp and p-Pb collisions observed by CMS, and the double-ridgestructure in p-Pb collisions measured by ALICE and ATLAS. We will show recent results from the analysis of two-particlecorrelations in pp, p-Pb, and Pb-Pb collisions in ALICE, with a particular focus on what we can learn from correlations insmall systems.

Primary authors : A., Ohlson (CERN)

Co-authors :

Presenter : A., Ohlson (CERN)







Status : SUBMITTED

Track judgments :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Recent results on two-particle angular correlation...


Abstract ID : 82

Charmonium production at mid-rapidityin Pb-Pb and p-Pb collisions with

ALICEContent :

Charmonium production is a sensitive probe of the QGP medium created in ultra-relativistic nuclear collisions. While theRHIC and SPS results showed a J/psi suppression in central collisions, the LHC results indicate that the formation ofcharmonium via quark (re)combination becomes a dominant effect at LHC energies, which counteracts the expectedstrong charmonium depletion due to colour screening. We will present an overview of the ALICE measurements on theproduction of J/psi in Pb-Pb collisions at a centre-of-mass energy sqrt(sNN) = 2.76 TeV and p-Pb collisions at sqrt(sNN) =5.02 TeV at mid-rapidity (|y_lab| < 0.9) down to zero transverse momentum. The cold nuclear matter effects estimatedfrom the p-Pb measurements and their impact on the interpretation of the hot medium effects will be discussed. Thecurrent theoretical understanding of these results will be presented using model calculations.

Primary authors : S.G., Weber (Technische Universitaet Darmstad)

Co-authors :

Presenter : S.G., Weber (Technische Universitaet Darmstad)







Status : SUBMITTED

Track judgments :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Charmonium production at mid-rapidity in Pb-Pb and...


Abstract ID : 83

Charmonium production in pp, p-Pband Pb-Pb collisions at forward rapidity

with the ALICE detector at the LHCContent :

The Quark-Gluon Plasma (QGP) is a state of matter expected to be produced at high temperature and energy density,conditions that can be reached in relativistic heavy ion collisions, like the ones produced at the LHC. Charmonium statesconstitute an important probe of the formation of the QGP since they are produced in the early stages of the collision,experiencing the full evolution of the system towards the confined hadronic matter. In particular, if the QGP is formed,charmonium states are expected to be suppressed due to color screening.Such suppression depends on the medium temperature and occurs sequentially according to the increasing binding energyof different states. On the other hand, charmonia could also be produced by (re)combination of charm quarks in thedeconfined medium or at the phase boundary.Furthermore, cold nuclear matter effects such as shadowing, parton energy loss or nuclear absorption could also affect thecharmonium yields leading to a more complex scenario. In order to disentangle among these effects, different collisionssystems must be studied (nucleon-nucleon, nucleon-nucleus, and nucleus-nucleus).The ALICE detector, specifically designed for the study and characterization of the QGP, allows one to study charmonia ina wide rapidity range and down to zero transverse momentum.The ALICE measurements of charmonium production at forward rapidity in pp collisions at sqrt(s) = 2.76 TeV and sqrt(s)= 7 TeV will be presented. The charmonium production at forward rapidity, as a function of transverse momentum andrapidity, in p-Pb collisions at sqrt(sNN) = 5.02 TeV will be reviewed. Then, the final results on charmonium production atforward rapidity in Pb-Pb at sqrt(sNN) = 2.76 TeV will be presented. Comparisons with theoretical predictions and otherexperimental results will also be discussed.

Primary authors : A. B., Camejo (Univ. B. Pascal, Clermont Ferrand)

Co-authors :

Presenter : A. B., Camejo (Univ. B. Pascal, Clermont Ferrand)







Status : SUBMITTED

Track judgments :


STRANGENESS IN QUARK MATTER 2... / Abstracts book Charmonium production in pp, p-Pb and Pb-Pb collis...


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Charmonium production in pp, p-Pb and Pb-Pb collis...


Abstract ID : 84

Low-mass dimuon measurements inpp, p-Pb and Pb-Pb collisions with

ALICE at the LHCContent :

Low-mass dimuon production, including light vector mesons rho, omega, phi, provides key information on the hot anddense state of strongly interacting matter produced in high-energy heavy-ion collisions. In this context, strangenessproduction can be studied via phi meson measurements, while the detailed description of the full dimuon mass spectradown to the kinematic threshold can be used to reveal in-medium modifications of hadron properties and the thermalemission arising from the medium. Measurements in pp and p-A systems, in absence of hot nuclear matter effects, must beused as a reference to test our knowledge of the processes expected to contribute to dilepton production.Dimuon production is studied with the ALICE apparatus at the LHC at forward rapidity (2.5 < y < 4) with the MuonSpectrometer. Results on low mass dimuon production are shown, for various center of mass energies per nucleon pair, inpp, p-Pb, and Pb-Pb collisions.

Primary authors : A., Uras (Univ. Claude Bernard, Lyon)

Co-authors :

Presenter : A., Uras (Univ. Claude Bernard, Lyon)







Status : SUBMITTED

Track judgments :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Low-mass dimuon measurements in pp, p-Pb and Pb-Pb...


Abstract ID : 85

Low-Mass Dielectron Measurements inpp, p-Pb and Pb-Pb Collisions with

ALICEContent :

Low-mass dielectrons are an important experimental tool to investigate the properties of strongly interacting matter, inparticular the quark-gluon plasma (QGP), which is created in ultrarelativistic heavy-ion collisions. Electrons do notinteract strongly and are emitted during all stages of the collision. Therefore, the space-time evolution of the collision canbe probed via dielectron measurements. In particular, possible modifications of the electromagnetic emission spectrum inthe QGP can be explored, where pp collisions are used as medium-free reference and p-A collisions may allow to separatecold from hot nuclear matter effects.

In this contribution, dielectron measurements at mid-rapidity are presented, where electrons are identified with the ALICEcentral barrel detectors. The invariant mass spectrum compared to hadronic cocktail calculations and the transversemomentum spectra of light vector mesons in pp collisions at sqrt(s) = 7 TeV are shown. The production cross section ofvirtual direct photons measured in pp collisions is compared to predictions from NLO pQCD calculations. Then, theinvariant mass and pair transverse momentum spectra in p-Pb collisions at sqrt(s_NN) = 5.02 TeV are discussed andcompared to the expected hadronic sources. Finally, the status of the dielectron analysis in Pb-Pb collisions at sqrt(s_NN) =2.76 TeV is presented.

Primary authors : M., Odzemir (W. Goethe Univ.)

Co-authors :

Presenter : M., Odzemir (W. Goethe Univ.)







Status : SUBMITTED

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Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Low-Mass Dielectron Measurements in pp, p-Pb and P...


Abstract ID : 86

Measurement of D-meson production inPb-Pb collisions at the LHC with ALICEContent :

Heavy quarks (charm and beauty) are considered effective probes to investigate the properties of the strongly-interactingmedium formed in high-energy nuclear collisions. Heavy quarks lose energy interacting with the medium via inelasticprocesses (medium-induced gluon radiation) and elastic collisions. The nuclear modification factor, R_AA, defined as theratio of the D-meson yield in nucleus-nucleus collisions and the pp cross section scaled with the average nuclear ovelapfunction, is an observable sensitive to in-medium energy loss. In particular, the comparison of the R_AA of charm,beauty and light-flavour hadrons can provide information about the colour-charge and parton-mass dependence of theenergy loss. The measurement of the D-meson azimuthal anisotropy, in addition, allows one to study whetherlow-momentum charm quarks, interacting with the medium constituents, participate in the collective expansion of thesystem. The D-meson azimuthal anisotropy and R_AA allow also to investigate the transport properties of the medium.D mesons (D0, D+ and D*+) are reconstructed in ALICE via their hadronic decay channels, and their production wasmeasured in Pb-Pb collisions at sqrt(sNN) = 2.76 TeV. The D-meson differential R_AA measurements, namely thetransverse-momentum and centrality dependence, will be shown, as well as the D0 R_AA measured in different azimuthalregions with respect to the reaction plane of the collision. The D-meson R_AA will be compared with light-flavour andnon-prompt J/psi results (measured by the CMS experiment). In addition, the D-meson azimuthal anisotropy, quantified interms of the elliptic flow v2, will be presented. Finally, the D-meson measurements will be compared to predictions fromtheoretical models.

Primary authors : A., Festanti (Univ. and INFN Padova)

Co-authors :

Presenter : A., Festanti (Univ. and INFN Padova)







Status : SUBMITTED

Track judgments :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Measurement of D-meson production in Pb-Pb collisi...


Abstract ID : 87

Measurements of D+(s) production inpp, p-Pb and Pb-Pb collisions with

ALICE at the LHCContent :

The measurement of charm production provides an excellent way to investigate the properties of the strongly-interactingQuark-Gluon Plasma (QGP) created in high-energy nucleus-nucleus collisions. Produced on short time scales compared tothe QGP formation time, charm quarks experience the entire evolution of the system interacting with its constituents. Inthis way, they lose energy and might participate in the collective motion of the system. Modifications of the momentumdistribution of charmed mesons are hence expected in Pb-Pb with respect to pp collisions. If recombination plays a role inthe hadronization of the charm quarks, the larger strangeness content in the QGP compared to pp collisions should bereflected in the observed D+(s) yields being larger than the yields of non-strange D mesons. ALICE has measured D+(s)production at mid-rapidity in pp (sqrt(s) = 7 TeV), p-Pb (sqrt(sNN) = 5.02 TeV) and Pb-Pb (sqrt(sNN) = 2.76 TeV) collisions,through the hadronic decay channel D+(s) -> phi pi -> K+ K- pi. The measured D+(s) yields, the nuclear modificationfactors for central and semi-central Pb-Pb collisions, and the yield ratios with respect to D0 and D+ mesons will be shownas a function of the transverse momentum in pp and Pb-Pb collisions.

Primary authors : A.M., Barbano (Univ. and INFN Torino)

Co-authors :

Presenter : A.M., Barbano (Univ. and INFN Torino)







Status : SUBMITTED

Track judgments :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Measurements of D+(s) production in pp, p-Pb and P...


Abstract ID : 88

D-meson production in pp and p-Pbcollisions measured with ALICE at the

LHCContent :

Heavy quarks (charm and beauty) are probes of the QCD matter formed in high-energy nuclear collisions. They areproduced in hard partonic scattering processes occurring in the initial stage of the collisions, propagate through themedium, and interact with its constituents, thus probing the entire evolution of the system.

Heavy-flavour measurements in pp collisions provide a reference for corresponding measurements in heavy-ion collisionsbut are also of prime interest in their own right, as a test of perturbative QCD calculations.The study of heavy-flavour production in proton-nucleus collisions promises insight into the role of cold nuclear mattereffects, such as the modification of parton densities in nuclei via shadowing or saturation and k_T-broadening or partonenergy loss in cold nuclear matter.

Furthermore, the dependence of heavy-flavour production on the multiplicity of charged particles produced in thecollision is sensitive to the interplay between hard and soft contributions to particle production. In particular, it could giveinsight into the role of multi-parton interactions, i.e. several hard partonic interactions occurring in a single collision athigh centre-of-mass energies.

In this contribution we present open heavy-flavour measurements with ALICE at the LHC, via the reconstruction of theD-meson hadronic decays in pp collisions at sqrt(s) = 2.76 and 7 TeV and p-Pb collisions at sqrt(s_NN) = 5.02 TeV. TheD-meson yields in the two systems are studied in various p_T intervals and also as a function of the charged-particlemultiplicity in the event, determined with different estimators, in different pseudorapidity regions.

Primary authors : C., Terrevoli (Univ. and INFN Padova)

Co-authors :

Presenter : C., Terrevoli (Univ. and INFN Padova)







Status : SUBMITTED

Track judgments :

STRANGENESS IN QUARK MATTER 2... / Abstracts book D-meson production in pp and p-Pb collisions measu...



Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book D-meson production in pp and p-Pb collisions measu...


Abstract ID : 89

Heavy-flavour and W-boson productionmeasurements via leptonic decaychannels with ALICE at the LHC

Content :

Heavy quarks, i.e. charm and beauty, are produced in hard partonic scatterings, hence their measurement at the LHC has atwofold interest. On the one hand, the measurement of open heavy flavours in pp collisions is considered an optimal testbench for perturbative QCD predictions. On the other hand, heavy quarks are well suited to investigate the state of matterproduced in heavy-ion collisions: their production happens during the very first stages of the collision and they aresensitive probes of the whole collision evolution.W bosons and their leptonic decay products, instead, only electroweakly interact with QCD matter and, therefore, are wellsuited to test the binary-collision scaling validity. In addition, their measurements could help constrain parton distributionfunctions in nuclei.With the wide rapidity coverage, precise vertexing, good tracking capabilities down to low p_T and excellent particleidentification features of the ALICE detector, heavy-flavour production can be studied via semi-leptonic decays of charmand beauty hadrons both at mid-rapidity (via electron identification) and at forward rapidity (via the muon decaychannel). W-boson production is measured via the contribution of its muonic decays to the inclusive p_T-differentialmuon yield.In the first years of LHC operations, ALICE recorded data in pp collisions at sqrt(s) = 2.76 and 7 TeV, in Pb-Pb collisions atsqrt(s_NN) = 2.76 TeV as well as in p-Pb collisions at sqrt(s_NN) = 5.02 TeV. A selection of the latest results both at midand at forward rapidity will be presented.

Primary authors : F., Bossù (iThemba Labs)

Co-authors :

Presenter : F., Bossù (iThemba Labs)







Status : SUBMITTED

Track judgments :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Heavy-flavour and W-boson production measurements ...


Abstract ID : 90

Latest results from the NA61/SHINEenergy scan

Content :

The NA61/SHINE programme on strong interactions covers the study of onset of deconfinement and aims to discover thecritical point of strongly interacting matter by performing an energy and system-size scan at the full CERN SPSmomentum range. So far the scans of p+p, p+Pb, Be+Be, as well as Ar+Sc this year, have been completed. Results from p+pand Be+Be collisions are now emerging, in particular the energy dependence of hadron spectra and yields. Status andpreliminary results from this effort will be presented.

Primary authors : LARSEN, Dag Toppe (Jagiellonian University)

Co-authors :

Presenter : LARSEN, Dag Toppe (Jagiellonian University)



Submitted by : LARSEN, Dag Toppe



Comments :

Status : SUBMITTED

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Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Latest results from the NA61/SHINE energy scan


Abstract ID : 91

(Anti-)strangeness production inheavy-ion collisions

Content :

We study the production of (anti-) strange and multi-strange hadrons inheavy-ion collisions from FAIR/NICA to RHIC energies within theParton-Hadron-String Dynamics (PHSD) microscopic transport approach,which contains the partonic and hadronic dynamics. By showing thechannel decomposition for the strangeness production we demonstratehow with increasing energy the production in the QGP dominates thehadronic production. We observed traces from the QGP by looking ata verity of 'bulk' observables like the excitation functions of particleyields, pt- and rapidity distributions, centrality dependencies of yields, etc.At RHIC energies strange and anti-strange hadrons are produced atmid-rapidity with the same amount, while with decreasing energy the particlesdominate more and more over antiparticles.

Primary authors : Mr. MOREAU, Pierre (Frankfurt Institute of Advanced Studies)

Co-authors :

Presenter : Mr. MOREAU, Pierre (Frankfurt Institute of Advanced Studies)

Track classification : Strangeness production (B. Mueller, Duke / H. Stoecker, Frankfurt & GSI ) ;Beam energy scan programs (Nu Xu, Berkeley / M. Gazdzicki, Frankfurt &Kielce)


Submitted by : Mr. MOREAU, Pierre



Comments :

Status : SUBMITTED

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Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book (Anti-)strangeness production in heavy-ion collisi...


Abstract ID : 92

Heavy hadrons in dense matterContent :

We will discuss the behavior of dynamically-generated baryon resonances with heavy-quark content content withinunitarized coupled-channel theories in matter. We will also analyze the implications for the propagation of heavy hadronsin heavy-ion collisions.

Primary authors : Dr. TOLOS, Laura (ICE, Barcelona)

Co-authors :

Presenter : Dr. TOLOS, Laura (ICE, Barcelona)

Track classification : Hadron resonances in the sQGP (C. Markert, UT Austin / C. Ratti, Houston &Turin)


Submitted by : Dr. TOLOS, Laura

Submitted on Thursday 09 April 2015


Comments :I have been invited to present a talk in the "Hadron Resonances in the sQGP".And I would like to apply for some support, such as waiving the conference fee, since ourtravel funds are very limited.Thank you.

Status : SUBMITTED

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Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Heavy hadrons in dense matter


Abstract ID : 93

Production of strange hadrons at LHCenergies measured with the ALICE

detectorContent :

The ALICE Collaboration has collected data in three collision systems at different energies during Run 1 of the LHC. Theproduction of (multi-)strange hadrons has been measured in proton-proton (pp), proton-lead (p-Pb) and lead-lead (Pb-Pb)collisions. Strange and multi-strange hadrons have been reconstructed via their weak decays into charged hadronsexploiting the excellent tracking and particle identification capabilities of the detector.

In this contribution, the evolution of strange particle production across the three systems will be discussed in terms ofparticle ratios and nuclear modification factors. Emphasis will be given to the most recent p-Pb results, where data havebeen found to exhibit features that are similar to those observed in Pb-Pb collisions.

Primary authors : M., Nicassio (GSI)

Co-authors :

Presenter : M., Nicassio (GSI)






Comments :Abstract centrally submitted by the ALICE Conference Committee. The name of the actualspeaker will be communicated later.

Status : SUBMITTED

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Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Production of strange hadrons at LHC energies meas...


Abstract ID : 94

Resonance production in pp, p-Pb andPb-Pb collisions measured by ALICE at

the LHCContent :

Ultra-relativistic heavy-ion collisions are used to create and study properties of strongly interacting hot and dense matter.The system produced in such collisions evolves through different stages, with the early partonic stage followed byhadronization.

Resonances are good candidates to investigate the different stages of the system evolution. Due to their short lifetimes,many of them decay inside the medium before the system breaks up. Resonances can probe the existence of particlerescattering and regeneration in the late hadronic phase, which could result in a modification of the measured yield ofresonances reconstructed in hadronic decay channels. Furthermore resonances contribute to a systematic study of thebaryon anomaly at intermediate transverse momentum and the flavor dependence of parton energy loss at highmomentum.

We present the most recent ALICE results on hadronic resonance production in pp, p-Pb and Pb-Pb collisions at LHCenergies. Transverse momentum spectra, integrated yields, mean transverse momenta, particle ratios and nuclearmodification factors are presented, discussed and compared to model predictions and earlier measurements.

Primary authors : V., Riabov (PNPI)

Co-authors :

Presenter : V., Riabov (PNPI)







Status : SUBMITTED

Track judgments :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Resonance production in pp, p-Pb and Pb-Pb collisi...


Abstract ID : 95

Charm quark and charmoniumproduction in quark-gluon plasma

Content :

Charm quark thermal production in quark-gluon plasma and its contribution to charmonium regeneration in relativisticheavy ion collisions are calculated in the frame of a detailed transport model. The charm quark and charmonium motionin the quark-gluon plasma are controlled by transport equations, and the evolution of the quark-gluon plasma is describedby hydrodynamics. The charmonium regeneration from the thermally produced charm quarks becomes important at LHCenergy $\sqrt{s_{NN}}$=5.1 TeV and will dominate the charmonium yield at $\sqrt{s_{NN}}$=39 TeV, especially in theregion of low transverse momentum.

Primary authors : Mr. ZHOU, Kai (Goethe University Frankfurt) ; Mr. CHEN, Zhengyu (TsinghuaUniversity)

Co-authors : Prof. ZHUANG, Pengfei (Tsinghua University)

Presenter : Mr. CHEN, Zhengyu (Tsinghua University)


Contribution type : --not specified--

Submitted by : Mr. CHEN, Zhengyu



Comments :

Status : SUBMITTED

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Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Charm quark and charmonium production in quark-glu...


Abstract ID : 96

Recent results for the(anti-)(hyper-)nuclei production andsearches for exotica by ALICE at the

LHCContent :

The excellent tracking and particle identification capabilities of the ALICE apparatus combined with the high particleproduction rates reached at the LHC in pp, pPb and in particular Pb-‐Pb collisions allow for a detailed study of theproduction of (anti-)(hyper-) nuclei and searches for exotica, like dibaryons.In this report,we present recent results on the production of (anti-)deuteron, (anti-)helium and (anti-)alpha.Further, we discuss recent results on the production and the lifetime of the (anti-)hypertriton. In addition, results from thesearches for the weakly-decaying exotic nuclear bound states H-dibaryon and Λn will be shown.The results are compared with the expectations from statistical (thermal) particle production and baryon coalescencemodels.

Primary authors : F., Barile (Univ. and INFN Bari)

Co-authors :

Presenter : F., Barile (Univ. and INFN Bari)







Status : SUBMITTED

Track judgments :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Recent results for the (anti-)(hyper-)nuclei pro...


Abstract ID : 97

Light flavour hadron production atintermediate and high pT measured

with the ALICE detectorContent :

ALICE has measured the production of inclusive and identified light flavour hadrons over a large transverse momentumrange in proton-proton, proton-Pb and Pb-Pb collisions at the LHC. These results provide an important baseline for pQCDcalculations and fragmentation models and are crucial for the interpretation of the strong high-pT suppression observed inPb-Pb collisions via the nuclear modification factor Raa. In this talk, a comprehensive summary of the results from theLHC Run 1 is presented from all collision systems. The combination of the measurements indicate that the strongsuppression is not an initial-state effect (parton shadowing and/or gluon saturation), but is rather the fingerprint of jetquenching in hot QCD matter. Particular focus is also put on the production of charged pions, kaons, and protons up to pT= 20 GeV/c in proton-proton and Pb-Pb collisions and on the comparison to recent QCD and phenomenologicalcalculations. Thanks to the use of the HMPID ring imaging Cherenkov detector, the good precision achieved in theintermediate region provides strong constraints for the models.

Primary authors : VOLPE, G. (Hungarian Ac. of Sc.)

Co-authors :

Presenter : VOLPE, G. (Hungarian Ac. of Sc.)







Status : SUBMITTED

Track judgments :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Light flavour hadron production at intermediate an...


Abstract ID : 98

Soft particle production and study ofcollective phenomena with the ALICE

detector at the LHC.Content :

After the successful completion of the first LHC run, a complete dataset of light flavour hadrons measured at midrapidityin pp, p-Pb and Pb-Pb collisions is available for detailed comparisons with soft particle-production models.The observation of a medium in local thermal equilibrium in nucleus-nucleus collisions is supported by the success ofthermal and hydrodynamic models in the description of hadron yields and spectral shapes, respectively. However, thepresence of collective phenomena in small systems created in pp and p-Pb collisions is still debated.In this talk, the evolution of particle yields and ratios as a function of collision energy, system size and of final-stateparticle multiplicity will be presented. The experimental significance of the deviations of particle yields observed betweendata and thermal model expectations will be also discussed. In addition, similarities and differences between large andsmall collision systems with respect to a mass dependent evolution of the spectral shapes will be highlighted.

Primary authors : GUERZONI, B. (Univ. and INFN Bologna)

Co-authors :

Presenter : GUERZONI, B. (Univ. and INFN Bologna)






Comments :Abstract centrally submitted by the ALICE Conference Committee; the actual presenterwill be defined later

Status : SUBMITTED

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Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Soft particle production and study of collective p...


Abstract ID : 99

Centrality dependence of particleproduction in p-Pb collisions at

sqrt(s_NN)= 5.02 TeV measured byALICE

Content :

We report measurements of the primary charged particle pseudorapiditydensity and transverse momentum distributions in p-Pb collisions atsqrt(s_NN) = 5.02 TeV, and investigate their correlation with experimental observables sensitive to the centrality of thecollision.Centrality classes are defined using different event activity estimators, i.e. charged particle multiplicities measured in threedifferent pseudorapidity regions as well as the energy measured at beam rapidity (zero-degree). The procedures todetermine the centrality, quantified by the number of participants (Npart), or the number of nucleon-nucleon binarycollisions (Ncoll), are described. We show that, in contrast to Pb-Pb collisions, in p-Pb collisions large multiplicityfluctuations together with the small range ofparticipants available, generate a dynamical bias in centralityclasses based on particle multiplicity.We propose to use the zero-degree energy, which we expect not to introduce a dynamical bias, as an alternativeevent-centrality estimator. Based on zero-degree energy centrality classes, the Npart dependence of particle production isstudied. Under the assumption that the multiplicity measured in the Pb-going rapidity region scales with the number ofPb-participants, an approximate independence of the multiplicity per participating nucleon measured at mid-rapitity of thenumber of participating nucleons is observed. Furthermore, at high-pt the p-Pb spectra are found to be consistent with thepp spectra scaled by Ncoll for all centrality classes.Our results represent valuable input for the study of the event activity dependence of hard probes in p-Pb collision and,hence, help to establish baselines for the interpretation of the Pb-Pb data.

Primary authors : TOIA, A. (W. Goethe Univ.)

Co-authors :

Presenter : TOIA, A. (W. Goethe Univ.)







Status : SUBMITTED

STRANGENESS IN QUARK MATTER 2... / Abstracts book Centrality dependence of particle production in p-...


Track judgments :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Centrality dependence of particle production in p-...


Abstract ID : 100

Prospects for heavy flavourmeasurements with the ALICE inner

and forward tracker upgradeContent :

During the second long shutdown of the LHC the ALICE detector will be improved with the installation of an upgradedInner Tracking System (ITS) and a new Muon Forward Tracker (MFT). These detectors will crucially contribute to theprecise characterization of the high-temperature, strongly-interacting medium created in ultra-relativistic Pb-Pb collisionsat sqrt(sNN) = 5.5 TeV.In the central barrel, the upgraded ITS will consist of seven cylindrical layers of silicon pixel detectors, starting at a radialdistance of 22.4 mm from the beam axis. At forward rapidity, the MFT will be composed of silicon pixel planes added inthe acceptance of the existing Muon Spectrometer (2.5 < eta < 4.0), upstream to the hadron absorber.Detailed results on the expected performance for heavy flavour measurements down to low transverse momentum, withthe upgraded ITS and MFT, will be given in central Pb–Pb collisions for various benchmark analyses, assuming anintegrated luminosity of 10 nb−1, as foreseen for the ALICE upgrade programme. In the central barrel, the focus is givenon the measurements of the nuclear modification factor and elliptic flow of several species of charm and beauty mesonsand baryons. In the forward region, results will be shown on the measurements of open charm in the semi-muonic decaychannel and beauty production using non-prompt J/psi mesons, as well as on the performance on the psi′ measurementdown to zero pT.

Primary authors : FIONDA, F. (Univ. and INFN Bari)

Co-authors :

Presenter : FIONDA, F. (Univ. and INFN Bari)







Status : SUBMITTED

Track judgments :


Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Prospects for heavy flavour measurements with the ...


Abstract ID : 101

Lambda hyperon production inproton-proton reactions at 3.5~GeV

measured with HADESContent :

The total production cross-section of $\Lambda$ hyperons in proton-proton reactions at $\sqrt{s} =\SI{3.18}{\GeV\per\square c}$ was measured with HADES in GSI Helmholtzzentrum f\"ur Schwerionenforschung inDarmstadt. Hyperons were reconstructed using invariant mass technique of identified negative pions and protons pairs.Particle identification was conducted using particles' energy deposition in four layers of tracking MDC gas chambers, andmomentum reconstruction from bending of the track in the toroidal magnetic field. Topological cuts and kinematicalconstrains on $\Lambda$ production and decay vertexes were applied to purify the $\Lambda$ sample. Experimental datawere compared to a model based on exclusive analyses of individual $\Lambda$ production channels measured by HADESat SIS18 energies in the same reactions. It employs resonant and non-resonant contributions to the total productionspectrum, in particular, the role played by intermediate resonances such as $\Sigma^{*}$ , $\Delta^{++}$ or N$^{*}$. Inaddition, it was shown in the complementary analysis that the assumption of pure phase-space production ofpK$\Lambda$ does not describe the experimental data measured for this final state, and an appropriate Partial WaveAnalysis (PWA) was carried out. Pinning down all contributions helps in tuning transport models (GiBUU and UrQMD) aswell as will improves the understanding of the production mechanism of $\Lambda$ in proton-nucleus reactions. Theseresults are of paramount importance for understand future measurements at SIS100 at FAIR.

Primary authors : Mr. LALIK, Rafal (Excellence Cluster Universe, TUM, E12)

Co-authors :

Presenter : Mr. LALIK, Rafal (Excellence Cluster Universe, TUM, E12)



Submitted by : Mr. LALIK, Rafal



Comments :

Status : SUBMITTED

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Judgment :

STRANGENESS IN QUARK MATTER 2... / Abstracts book Lambda hyperon production in proton-proton reactio...


Abstract ID : 102

Importance of different energy losseffects in jet suppression at RHIC and

LHCContent :

High momentum hadron suppression is considered to be excellent tool for studying the properties of QCD matter createdin ultra-relativistic heavy ion collisions. For this study we use our recently developed dynamical energy loss formalism [1],which includes the following key effects: i) dynamical scattering centers, ii) QCD medium of a finite size, iii) bothradiative and collisional energy losses, iv) running coupling and v) finite magnetic mass. We further incorporate thisformalism into numerical procedure [1] in order to generate suppression predictions, by using no free parameters, whichwe then compare with experimental suppression data. A robust agreement of our predictions with experimentallymeasured RAA for different experiments (RHIC and LHC), probes and all available centrality regions [1,2], raised thequestion whether this agreement is consequence of a single effect or of a superposition of all these effects. This question issignificant, since other pQCD energy loss models neglect some or most of these features. In order to systematically resolvewhich of these different energy loss effects (all required based on theoretical grounds) has significant impact on accuratelyexplaining the data, we choose the clear energy loss probe – D meson suppression (since fragmentation function does notalter bare charm quark suppression) . We here concentrate on central 200 GeV Au+Au collisions at RHIC and 2.76 TeVcollisions at LHC, and start from static approximation and gradually add different effects in our calculations [3]. Inparticular, we study the importance of abolishing static in favor of dynamical approximation and of including collisionalenergy loss, finite size effects, running coupling and finite magnetic mass, where the recently available LHC RAA dataserve as a benchmark for assessing the importance of each effect. We obtained that, although the inclusion of dynamicalscattering center has the largest relative importance, all the other effects are also important, since they lead to fineimprovements of the agreement. Therefore, the robust agreement is a cumulative effect of all these features, withdynamical effects being crucial for accurate energy loss expressions.[1] M. Djordjevic and M. Djordjevic, Phys. Lett. B 734 (2014) 286.[2] M. Djordjevic, M. Djordjevic and B. Blagojevic , Phys. Lett. B 737 (2014) 298.[3] B. Blagojevic and M. Djordjevic, Journal of Phys. G, in press (2015).

Primary authors : Ms. BLAGOJEVIC, Bojana (Institute of Physics, University of Belgrade, Serbia)

Co-authors : Dr. DJORDJEVIC, Magdalena (Institute of Physics, University of Belgrade, Serbia)

Presenter : Ms. BLAGOJEVIC, Bojana (Institute of Physics, University of Belgrade, Serbia)



Submitted by : Ms. BLAGOJEVIC, Bojana



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Status : SUBMITTED

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Importance of different energy loss effects in jet...



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Importance of different energy loss effects in jet...


Abstract ID : 104

Strangeness production in U+Ucollisions at RHIC

Content :

Enhanced strange quark production in high-energy heavy-ion collisions relative to p+p collisions was proposed as apossible signature of deconfined phase of quarks and gluons [1]. It was suggested that the dominant process for theproduction of strange quarks in quark gluon plasma is gluonic fusion. Chemical equilibration of strange quarks formed insuch medium happens faster than would be the situation in hadronic scenario [2].With 20% larger energy density expected [3] and a larger lifetime of fireball [4] than Au+Au collisions, we can have abetter insight of testing these facts in U+U collisions. Moreover, with its substantial prolate shape U nuclei can havedifferent geometrical orientation during collision [5]. It is interesting to check the dependence of strangeness production insuch configurations compared to the geometrically symmetric Au+Au collisions.We will present transverse momentum (pT ) spectra of Ks , Λ(Λ ̄) and Ξ(Ξ ̄) in U+U collisions at √sNN = 193 GeV in STARexperiment at RHIC. These strange particles are reconstructed from their weak decay topology via dominant hadronicdecay modes using the Time Projection Chamber(TPC) detector of STAR. Measured masses of these particles areconsistent with PDG values. A clear centrality dependence is observed for these particles. We ’ll also show comparison ofthese results with Au+Au 200GeV results.

References[1] J. Rafelski and B. Muller, Phys. Rev. Lett. 48,1066 (1982)[2] P. Koch, B. Muller and J. Rafelski, Phys. Rep. 142, 167 (1986).[3] D. Kikoa, G. Odyniec, and R. Vogt, Phys. Rev. C 84,054907,(2011) [4] John Campbell,QM -2014 Poster(I-08)[5] R. Haque, Z. Lin and B. Mohanty, Phys. Rev. C 85,034905,(2012)

Primary authors : Mr. TRIPATHY, Srikanta Kumar (Institute Of Physics)

Co-authors :

Presenter : Mr. TRIPATHY, Srikanta Kumar (Institute Of Physics)



Submitted by : Mr. TRIPATHY, Srikanta Kumar


Last modified on : Friday 10 April 2015

Comments :(for the STAR collaboration)

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Abstract ID : 106

From the lepton protoplasm to hadrongenesis

Content :

The study of the so-called QGP is the beginning of the formation of the elementaryparticle kinetics. Here a joining is outlined between Dirac’s particle physics and Prigogine’s dynamics of not inequilibrium systems. Therefore, the problem of formation of a complex object though a simple one occupies central placein this field of research. In recent years we have achieved holistic description of lepton sector. It was received completeand closed set of lepton equations on the basis of five assumptions. They describethe massive and massless, charged and neutral, stable and unstable leptons in the free states. The presence of individualstructure was established for each lepton equation. Four connected components of homogeneous Lorentz group arestructural components of the equations for stable leptons. For the unstable leptons these are maximal invariant subgroupswhich areisomorphic stable leptons groups. Unstable leptons can be considered as a specific state of protoplasm, having limitedlifetime and possessing at the same time a set of properties to be experimentally observableobjects. This situation creates the unique opportunity to study and describe the structureof hadrons on relativistic basis like leptons. A special interest for the key problems of current conference is the decays oftau-leptons.They can decay directly into leptons and hadrons with subsequent decay of hadrons again into leptons. Stability of thefinal decay products proves that their structures are simpler than structures of hadrons. On the other hand, the fact thatthe decay of tau-leptons on hadrons is a direct indication on possibility to describe the hadrons in the same terms as theleptons.In general, the decay of unstable particles from the free state with release of energy can be seen as a process reverse to thesynthesis not in vacuum, but in an environment where the processes of energy dissipation become possible. Suchenvironment is lepton protoplasm which is equally suitable for lepton and hadron genesis. The unit basis of origin is thebail for the unity description. With this approach, there are additional possibilities appear for qualitative understandingand mathematical description of the time irreversibility and asymmetry of matter-antimatter in the universe at themicroscopic level.

Primary authors : Dr. KOSMACHEV, Oleg (JINR)

Co-authors :

Presenter : Dr. KOSMACHEV, Oleg (JINR)



Submitted by : Dr. KOSMACHEV, Oleg



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STRANGENESS IN QUARK MATTER 2... / Abstracts book From the lepton protoplasm to hadron genesis


Abstract ID : 109

Measurements of strange hadronsK^0_{S}, Lambda and Xi from Au+Aucollisions at sqrt_{s_{NN} = 14.5 GeV

in STARContent :

Lattice QCD calculations [1-3] indicate that there is a critical endpoint of the first order phase transition at the intermediate baryonchemical potential (250<$\mu_{B}$<450~MeV). Searches for the criticalpoint and the onset of deconfinement are the main motivations of thebeam energy scan program at RHIC. Strangeness (especially the multi-strangeness) production has been suggested as asensitive probe tothe early dynamics of the deconfined matter created in heavy ion collisions. The RHIC beam energy scan data takenduring 2010 and 2011have indicated the change of medium properties in between $\sqrt_{s_{NN}}$ 19.6 GeV and $\sqrt_{s_{NN}}$ 11.5 GeV. Thefirst phaseof RHIC beam energy scan program was completed with the data taking ofAu+Au collisions at $\sqrt_{s_{NN}}$ 14.5 GeV in 2014. The productionsof mid-rapidity $\K^0_{S}$, $\Lambda$ and $\Xi$ from this energy will besystematically presented. We will report these strange hadron spectra,nuclear modification factors and particle ratios. Thephysicsimplications on the collision dynamics will also be discussed.

References:

[1] F. Karsch et al., Nucl. Phys. Proc. Suppl. 129, 614 (2004),hep-lat/0309116.[2] Z. Fodor and S. D. Katz, JHEP 04, 050 (2004), hep-lat/0402006.[3] R. V. Gavai and S. Gupta, Phys. Rev. D71, 114014 (2005), hep-lat/0412035.

Primary authors : Mr. ASHRAF, Muhammad Usman (Tsinghua University)

Co-authors :

Presenter : Mr. ASHRAF, Muhammad Usman (Tsinghua University)



Submitted by : Mr. ASHRAF, Muhammad Usman



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Measurements of strange hadrons K^0_{S}, Lambda an...


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STRANGENESS IN QUARK MATTER 2... / Abstracts book Measurements of strange hadrons K^0_{S}, Lambda an...


Abstract ID : 110

J_psi and psi(2S) measurements inp+p collisions at sqrt{s} = 200 and 500

GeV with the STAR experimentContent :

Despite extensive studies, the J/$\psi$ production mechanism in hadron collisions is not yet exactly known.For many years, mostly J/$\psi$ differential cross-section measurements have been used to test different J/$\psi$production models. While many models can reasonably well describe the experimental data on the J/$\psi$ cross-section in$p+p$ collisions, they have different predictions for the J/$\psi$ polarization. Therefore, measurements of the J/$\psi$polarization may allow to discriminate among different models and provide new insight into the J/$\psi$ productionmechanism.

In this talk, results on the J/$\psi$ cross-section in $p+p$ collisions at $\sqrt{s}$ = 200 and 500 GeV and the J/$\psi$polarization at $\sqrt{s}$ = 200 GeV measured via the dielectron decay channel at mid-rapidity with the STAR experimentwill be discussed. A new J/$\psi$ polarization measurement at $\sqrt{s}$ = 500 GeV will be reported, where bothpolarization parameters, $\lambda_{\theta}$ and $\lambda_{\phi}$, in the helicity and Collins-Soper reference frames areextracted in a wide transverse momentum range of 5 $< p_{T} <$ 16 GeV/$c$. The first $\psi(2S)$ measurement at $\sqrt{s}$= 500 GeV will also be shown. Moreover, prospects of charmonium measurements with the newly upgraded STARdetector will be reported.

Primary authors : Dr. TRZECIAK, Barbara (Czech Technical University in Prague)

Co-authors :

Presenter : Dr. TRZECIAK, Barbara (Czech Technical University in Prague)



Submitted by : Dr. TRZECIAK, Barbara



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STRANGENESS IN QUARK MATTER 2... / Abstracts book J_psi and psi(2S) measurements in p+p collisions a...


Abstract ID : 111

Local equilibration and Cooper-Fryenegative contributions in a

coarse-grained transport approachContent :

Hybrid approaches are very successful in the description of the dynamics of heavy ion collisions. In the high densityregime one takes advantage of relativistic hydrodynamics, while at lower density non-equilibrium transport models areapplied. Handling the transitions between fluid dynamics and the transport description includes uncertainties, both whengenerating the initial condition by turning particles into fluid (fluidization) and in the final stages when particles aresampled from the fluid (particlization). Our study is devoted to investigating the uncertainties in these transitions.

The application of fluid dynamics requires the system to be close to local equilibrium. Whether this is reached or not in areasonable amount of time remains debatable, especially for strange particles. So far in all hybrid approaches fluidizationis forced on an ad hoc surface, where matter may be not thermalized yet. In this contribution the UrQMD hadrontransport approach is used to study the early time dynamics of heavy ion collisions at $\sqrt{s_{NN}} = 3-20$ GeV. Theenergy-momentum tensor of coarse-grained UrQMD events as a function of space and time is evaluated to explore thedegree of local equilibration of the system. In this way, suitable conditions for a consistent fluidization are determined.

At the end of the hydrodynamical evolution the fluid has to be converted into particles using the Cooper-Frye formula. Itis known that so-called "negative contributions" arise on the Cooper-Frye hypersurface - particles that fly back to thefluid-dynamical region. Negative contributions are usually neglected in hybrid approaches, which leads to uncertainties inthe final particle spectra. These uncertainties are systematically investigated at energies of $\sqrt{s_{NN}} = 3-20$ GeVagain using coarse-grained UrQMD transport [1]. Negative contributions are found to decrease with hadron mass (e. g. forkaons they are larger than for Lambdas), decrease from central to peripheral collisions and non-monotonously depend oncollision energy. The largest impact of negative contributions is found to be on the pion rapidity distribution atmidrapidity in central collisions. For this case negative contributions in equilibrium constitute 8–13% of positivecontributions, depending on collision energy. At the same time, for kaons this number is only 3-6%, for Lambdas andnucleons they are even smaller. This means that the uncertainty in spectra caused by the freeze-out procedure isnon-negligible for pions, already bearable for kaons and quite small for nucleons and Lambdas.

[1] D. Oliinychenko, P.Huovinen, H. Petersen, Phys. Rev. C 91, 024906 (2015)

Primary authors : Mr. OLIINYCHENKO, Dmytro (Frankfurt Institute for Advanced Studies,D-60438 Frankfurt am Main, Germany)

Co-authors : Dr. HUOVINEN, Pasi (Frankfurt Institute for Advanced Studies, D-60438 Frankfurtam Main, Germany; Institut für Theoretische Physik, Goethe-Universität, D-60438 Frankfurtam Main, Germany) ; Prof. PETERSEN, Hannah (Frankfurt Institute for Advanced Studies,D-60438 Frankfurt am Main, Germany; Institut für Theoretische Physik, Goethe-Universität,D-60438 Frankfurt am Main, Germany)

Presenter : Mr. OLIINYCHENKO, Dmytro (Frankfurt Institute for Advanced Studies, D-60438 Frankfurt am Main, Germany)



Submitted by : Mr. OLIINYCHENKO, Dmytro

STRANGENESS IN QUARK MATTER 2... / Abstracts book Local equilibration and Cooper-Frye negative contr...




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STRANGENESS IN QUARK MATTER 2... / Abstracts book Local equilibration and Cooper-Frye negative contr...


Abstract ID : 112

Charged particle production inlead-lead and proton-lead collisionsmeasured by the ATLAS detector.

Content :

The ATLAS experiment at the Large Hadron Collider measures charged hadron spectra in Pb+Pb and p+Pb collisions. Theresults are compared to the p+p spectra of charged hadrons at the same centre-of-mass energy. Charged hadrondistributions from Pb+Pb are compared to charged particle cross-sections in p+p collisions at sqrt(s) = 2.76 TeV, referencecross-section for p+Pb at sqrt(sNN) = 5.02 TeV is reconstructed using sqrt(s) = 2.76 TeV and 7 TeV p+p results. These allowfor a detailed comparison of the collision systems in a wide transverse momentum and rapidity ranges in differentcentrality intervals. The nuclear modification factors RAA and RpPb are presented as a function of centrality, pT, η. Thecharged particle RAA are found to vary significantly as a function of transverse momentum, shows a pronouncedminimum at about 7GeV. Above 60GeV, RAA is consistent with a flat, centrality-dependent, value within theuncertainties. RpPb results show strong rapidity dependence in the region of so-called Cronin peak at about 2 GeV andabove pT of 10 GeV show anomalous enhancement.

Summary :

for the ATLAS Collaboration

Primary authors : Mr. SHULGA, Evgeny (NRNU "MEPhI")

Co-authors :

Presenter : Mr. SHULGA, Evgeny (NRNU "MEPhI")



Submitted by : Mr. SHULGA, Evgeny



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Charged particle production in lead-lead and proto...


Abstract ID : 113

An evidence for thehadron-quark-gluon mixed phase

formation in nuclear collisionsContent :

With the help of an advanced version of the hadron resonance gas model we have found remarkable irregularities ofrelativistic heavy-ion collisions at chemical freeze-out. They include an abrupt change of the effective number of degreesof freedom at laboratory energies 8.9-11.6 AGeV and plateaus in the collision-energy dependence of the entropy perbaryon, total pion number per baryon, and thermal pion number per baryon at laboratory energies 6.9-11.6 AGeV [1]. Alsoat chemical freeze-out we observe a sharp peak in the dimensionless trace anomaly at laboratory energy 11.6 AGeV [2].On the basis of the generalized shock-adiabat model we demonstrate that these observations give evidence for theanomalous thermodynamic properties of the mixed phase at its boundary to the quark-gluon plasma [2]. We argue thatthe trace anomaly peak and the local minimum of the generalized specific volume observed at a laboratory energy of 11.6AGeV provide a signal for the formation of a mixed phase between the quark-gluon plasma and the hadron phase.As an independent verification of these results we performed a systematic meta-analysis of the data quality description ofexisting event generators of nucleus-nucleus collisions which allows us to extract a very important physical information.Our meta-analysis is dealing with the results of 10 event generators which describe data measured in the range of center ofmass collision energies from 2.1 GeV to 17.3 GeV. It considers the mean deviation squared per number of experimentalpoints obtained by these event generators, i.e. the data quality description, as the results of independentmeta-measurements. These generators and their data quality descriptions we divided in two groups. The first groupincludes the generators which account for the quark-gluon plasma formation during nuclear collisions (QGP models),while the second group includes the generators which do not assume the QGP formation in such collisions (hadron gasmodels). Comparing the data quality description of more than a hundred of different data sets of strange hadrons by twogroups of models, we found two regions of the equal quality description of data which are located at the center of masscollision energies 4.4-4.87 GeV and 10.8-12 GeV. At the collision energies between 5 GeV and 10.8 GeV and above 12 GeVwe found that QGP models describe data essentially better than the hadron gas ones and, hence, these regions we associatewith the quark-gluon phase. As a result, the collision energy regions 4.4-4.87 GeV and 10.8-12 GeV we interpret as theenergies of the hadron-quark-gluon mixed phase formation. Based on these findings we argue that the most probableenergy range of the QCD phase diagram (tri)critical endpoint is 12-14 GeV. The practical suggestions for the collisionenergies of the future experiments on RHIC, NICA and FAIR are formulated.

1. K. A. Bugaev, A. I. Ivanytskyi, D. R. Oliinychenko, V. V. Sagun, I. N. Mishustin, D. H. Rischke, L. M. Satarov and G. M.Zinovjev, Thermodynamically Anomalous Regions As A Mixed Phase Signal, Phys. Part. Nucl. Lett. 12, 238-245 (2015).2. K. A. Bugaev, A. I. Ivanytskyi, D. R. Oliinychenko, V. V. Sagun, I. N. Mishustin, D. H. Rischke, L. M. Satarov and G. M.Zinovjev, Thermodynamically Anomalous Regions and Possible New Signals of Mixed Phase Formation, arXiv:1412.0718[nucl-th].3. V. A. Kizka, V. S. Trubnikov, K. A. Bugaev and D. R. Oliinychenko, A possible evidence of the hadron-quark-gluonmixed phase formation in nuclear collisions, in preparation.

Primary authors : Dr. BUGAEV, Kyrill (Bogolyubov Institute for Theoretical Physics of the NationalAcademy of Sciences of Ukraine, 03680, Kiev, Ukraine)

Co-authors : Mr. OLIINYCHENKO, Dmytro (Frankfurt Institute for Advanced Studies) ; Dr. IVANYTSKYI, Alexei (Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine, 03680, Kiev, Ukraine) ; Mrs. SAGUN, Violeta (Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine, 03680, Kiev, Ukraine) ; Prof. ZINOVJEV, Gennady (Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine, 03680, Kiev, Ukraine) ; Dr. KIZKA, Valeriy (National Science Center “Kharkov Institute of Physics and Technology”, 61108, Kharkov,

STRANGENESS IN QUARK MATTER 2... / Abstracts book An evidence for the hadron-quark-gluon mixed p...


Ukraine) ; Dr. TRUBNIKOV, V. S. (National Science Center “Kharkov Institute of Physicsand Technology”, 61108, Kharkov, Ukraine) ; Dr. NIKONOV, Edward (Laboratory forInformation Technologies, JINR, Dubna, Russia)

Presenter : Mr. OLIINYCHENKO, Dmytro (Frankfurt Institute for Advanced Studies)



Submitted by : Mr. OLIINYCHENKO, Dmytro



Comments :This is not my primary talk. I was kindly asked to present this report on the behalf of KyrillBugaev and his ukrainian group. For political reasons they have no possibility to come tothe conference.

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STRANGENESS IN QUARK MATTER 2... / Abstracts book An evidence for the hadron-quark-gluon mixed p...


Abstract ID : 115

Strong Decays of Upsilon(4s),phi(1020) and Sigma(1385) in Magnetic

FieldContent :

We suggest that strong decays of $\phi(1020)$ and $\Upsilon(4s)$ mesons can be affected in magnetic fields of strength$10^{14}-10^{15}$ T, which are created in relativistic collisions of nuclei at RHIC and LHC. Due to the interaction ofcharged $K$ and $B$ mesons with the magnetic field, branching ratios for $K+K-$ and $B+B-$ decays of $\phi(1020)$ and$\Upsilon(4s)$ mesons may become reduced by 50% or more (compared to vacuum B=0 values). We shall also discuss, howthe interaction of$\Sigma(1385)$ baryon and of its decay products with the magnetic field may affect the probability (branching ratios) of$\Sigma(1385)$ strong decay channels.

Summary :

Extremal static magnetic fields can influence the probability of strong decay channels of mesons and hadronic resonancesdue to the increase of (lowest possible) n=0 Landau level energy of charged particles (decay products). Such phenomenonhas been suggested to suppress decays Rho(770)--> pi+pi- in magnetic field [Phys.Rev.D82(2011)085011]. We shall applythis approach to decays of $\phi(1020)$ and $\Upsilon(4s)$ mesons. In the case of $\Sigma(1385)$ decays we also take intoaccount interaction of the magnetic moments of hadrons with the external static magnetic field and we show that isospinrules determining strong decays channels probabilities become gradually violated in the magnetic field.This approach has been already discussed at Baldin XXII (2014) conference:http://pos.sissa.it/archive/conferences/225/119/Baldin%20ISHEPP%20XXII_119.pdf

Primary authors : Dr. FILIP, Peter Filip (Institute of Physics, Slovak Academy of Sciences,Bratislava)

Co-authors :

Presenter : Dr. FILIP, Peter Filip (Institute of Physics, Slovak Academy of Sciences, Bratislava)

Track classification : Hadron resonances in the sQGP (C. Markert, UT Austin / C. Ratti, Houston &Turin) ; Heavy flavor production and transport (R. Rapp, Texas A&M; / H. VanHees, Frankfurt) ; Strangeness production (B. Mueller, Duke / H. Stoecker,Frankfurt & GSI )


Submitted by : Dr. FILIP, Peter Filip



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Strong Decays of Upsilon(4s), phi(1020) and Sigma(...


Judgment :


Judgment :


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STRANGENESS IN QUARK MATTER 2... / Abstracts book Strong Decays of Upsilon(4s), phi(1020) and Sigma(...


Abstract ID : 116

SELF-SIMILARITY OFSTRANGENESS PRODUCTION IN pp

COLLISIONS AT RHICContent :

New experimental data on transverse momentum spectra of strangeparticles $(K_S^0, K^-,K^*,\phi)$ produced in $pp$ collisionsat $\sqrt s =200$~GeV obtained by the STAR and PHENIX collaborations at RHIC are analysed in the framework of$z$-scaling approach.Scaling properties of the data $z$-presentation are illustrated.Self-similarity of strange particle production is discussed.A microscopic scenario of constituent interactions developed within the $z$-scaling approach is used to study thedependence of momentum fractions and recoil mass on the collision energy , transverse momentum and mass of inclusiveparticle and to estimate the constituent energy loss. We consider that obtained results can be useful for understandingstrangeness origin, for searching for new physics with strange probes and can serve as a benchmark for complex analysisof self-similar features of strange production in heavy ion collisions.

Primary authors : Prof. TOKAREV, Mikhail (Joint Institute for Nuclear Research)

Co-authors : Dr. ZBOROVSKY, Imrich (Nuclear Physics Institute, Academy of Sciences of theCzech Republic, Rez, Czech Republic)

Presenter : Prof. TOKAREV, Mikhail (Joint Institute for Nuclear Research)



Submitted by : Prof. TOKAREV, Mikhail



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Abstract ID : 117

Heavy Flavors in Heavy Ion Collisionswith PHENIX Experiment at RHIC

Content :

It is a common believe that laboratory collisions of heavy ions accelerated to high momenta result in production of matterwhich is hot, dense and processes hydro dynamical properties of strongly coupled liquid with viscosity to entropy ratio inthe vicinity of quantum bound. Hadrons carrying open heavy flavors, which at RHIC energies can’t be producedthermally, are the key diagnostic tools available to study the properties of this matter. The heavy quark production in ppcollisions has proven itself as a critical test to validity of FONLL pQCD calculations and as such serve a robust baseline forheavy-flavor studies in nucleus-nucleus collisions.In this talk we report on systematic studies of open heavy flavor production in nucleus-nucleus collisions conducted byPHENIX experiment at RHIC. It was confirmed that as expected the total heavy-flavor yields scale with binary collisions.Rather unexpectedly it was observed that during thermalization process the heavy quarks stay strongly coupled with themedium leading to measured nuclear modification factor and flow of decay leptons (electrons and muons) similar to thatof ordinary hadrons. It is still unclear which mechanism is responsible for observed energy loss and decay spectramodifications.This and other similar questions will be addressed in a few years when the completed stochastic cooling upgrade to theRHIC accelerator will bring new opportunities to RHIC experiments. With new beam projections the full acceptanceupgraded PHENIX detector will record 100 billion Au+Au minimum bias collisions in a typical one-year run. Billions ofrecorded events will provide RHIC and a new sPHENIX detector the outreach into currently unexplored territory of lowcross sections yields and fully reconstructed tagged jet measurements.

Primary authors : Dr. KISTENEV, Kistenev (Brookhaven National Laboratory)

Co-authors :

Presenter : Dr. KISTENEV, Kistenev (Brookhaven National Laboratory)



Submitted by : Dr. KISTENEV, Edouiard



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Heavy Flavors in Heavy Ion Collisions with PHENIX ...


Abstract ID : 118

Hyperon puzzle and the RMF modelwith scaled hadron masses and

coupling constantsContent :

Measurements of neutron stars with masses larger or about 2 solar masses imply that the nuclear equation of state (EoS)should be sufficiently stiff. The stiffness of the Eos is however restricted from above by the constraint from the analysis ofparticle flow in heavy-ion collisions. The dilemma sharpens if hyperons are included. Since Lambdas and Xi baryonsexperience attractive potentials in nuclear matter at the saturation density a naive extrapolation of these potentials wouldlead unavoidably to the appearance of hyperons in the neutron star interiors. That would soften the EoS and lead to thecontradiction with the observable star masses (so-called hyperon puzzle). We show that this problem can be resolved ifone takes into account a reduction of the mass of the phi meson which mediates a repulsion among hyperons. We proposea relativistic mean-field model with hadron masses and coupling constants depending on the scalar field. All hadronmasses undergo a universal scaling, whereas the coupling constants are scaled differently. The appearance of hyperons indense neutron star interiors is accounted for. The equation of state satisfies well the constraints known from analyses ofthe astrophysical data and particle production in heavy-ion collisions.

Primary authors : Dr. KOLOMEITSEV, Evgeni (Matej Bel University)

Co-authors : Mr. MASLOV, Konstantin (NRNU MEPhI) ; Prof. VOSKRESENSKY, Dmitry (NRNUMEPhI)

Presenter : Dr. KOLOMEITSEV, Evgeni (Matej Bel University)

Track classification : Strangeness in Astrophysics (H.-J. Schulze, Catania / J. Schaffner-Bielich,Frankfurt)


Submitted by : Dr. EVGENI, Kolomeitsev



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Hyperon puzzle and the RMF model with scaled hadro...


Abstract ID : 119

Inverse magnetic catalysis in thethree-flavor NJL model with axial-vector

interactionContent :

We explore the chiral phase transition in QCD within the three-flavor Nambu-Jona-Lasinio model with a negativecoupling constant in the isoscalar axial-vector channel, which is associated with a polarized instanton–anti-instantonmolecule background. The QCD phase diagram described in this scenario shows a new first order phase transition aroundthe transition temperature Tc toward a phase without chiral condensates, but with nontrivial dynamic chiral chemicalpotentials for the light quarks, spontaneously giving rise to local charge parity violation and local chirality imbalance. Thecorresponding critical temperature T5c for this phase transition decreases with the magnetic field and it gives a naturalexplanation to the inverse magnetic catalysis effect for light quarks when incorporating a reasonable value of the couplingconstant in the isoscalar axial-vector channel. Furthermore, when the isoscalar axial-vector interaction is dominant in thelight quark sector and suppressed in the strange quark sector, it is found that there is no inverse magnetic catalysis forstrange quark condensate, which agrees with lattice results.

Primary authors : Dr. YU, Lang (Institute of High Energy Physics, Chinese Academy of Sciences)

Co-authors :

Presenter : Dr. YU, Lang (Institute of High Energy Physics, Chinese Academy of Sciences)



Submitted by : Dr. YU, Lang

Submitted on Sunday 12 April 2015

Last modified on : Sunday 12 April 2015

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Inverse magnetic catalysis in the three-flavor NJL...


Abstract ID : 120

Study of Coalescence and Collectivityin pPb and Pb-Pb collisions at LHC

energy using String Melting version ofA Multiphase Transport Model

Content :

Existence of long range correlation in small systems formed in p-Pb and d-Au collision at LHC and RHIC respectively isone of the major discoveries. So called ridgelike structure as observed in di-hadron correlation measurement seems to be trivial for heavy ion collisions owing to eventplane correlation. Such structures are most unlikely to occur in small systems mentioned above. A possible explanationwas achieved from the models where initial state is described by a saturated system of gluons known as CGC. However,similar structure extended over a long pseudo-rapidity range can also be obtained from incoherent parton scattering. Toinvestigate the effect of incoherent parton scattering on such observables, here we have analysed events from StringMelting (SM) version of A Multiphase Transport Model (AMPT) for p-Pb collsion at Sqrt(s)=5.02 TeV by varying theparton scattering cross-section and turning off and on the final state interaction among the produced hadrons. AMPT (SM)has incoherent parton scattering as an ingredient.The study to be presented will include the search of the ridge structure in pPb collisions by using the deltaEta-deltaPhicorrelation method. The centrality dependence of the jet like and ridge yield will be obtained and compared with Pb-Pbcollisions. The v2-coefficients will be extracted for those long range particles by different methods and particle dependencewill be reported.

Primary authors : Mr. SARKAR, Debojit (VECC,HBNI,INDIA)

Co-authors : Mr. CHOUDHURY, Subikash (VECC,HBNI,INDIA) ; Mr. CHATTOPADHYAY,Subhasis (VECC,HBNI,INDIA)

Presenter : Mr. SARKAR, Debojit (VECC,HBNI,INDIA)



Submitted by : Mr. SARKAR, Debojit



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Study of Coalescence and Collectivity in pPb and P...


Abstract ID : 121

Strange behavior of rapidity dependentstrangeness enhancement of particlescontaining and not containing leading

quarksContent :

It has now been realized that in relativistic heavy ion collisions strangeness conservation law may be violated locally [1]and thus studies on rapidity dependent strangeness enhancement factor is of considerable significance. Strangenessenhancement factors of various produced particles in Au+Au collisions at FAIR energy (30A GeV) have been studied as afunction of rapidity with the help of a string based hadronic transport model UrQMD-3.3 (Ultra Relativistic QuantumMolecular Dynamics). A strong rapidity dependent strangeness enhancement could be observed with our generated datafor Au + Au collisions. The strangeness enhancement is found to be maximum at mid-rapidity for the particles containingleading quarks while for particles having produced quarks only, the situation is seen to be otherwise. Such rapiditydependent strangeness enhancement could be understood from the dependence of rapidity width on centrality orotherwise on the variation of net-baryon density with collision centrality [2,3]. It is expected that the predictions of thisstudy could be tested with the upcoming large acceptance FAIR-CBM detector of GSI, Darmstadt.

Reference[1] J.Steinheimer et al. Phys. Lett. B676 (2009).[2] Kalyan Dey and B. Bhattacharjee, arXiv:1503.06283 [hep-ph][3] Kalyan Dey and B. Bhattacharjee, Phys. Rev. C 89 (2014) 054910 (2014)

Primary authors : Mr. DEY, Kalyan (Department of Physics, Gauhati University, Deptartment ofPhysics, Bodoland University, India)

Co-authors : Prof. BHATTACHARJEE, Buddhadeb (Nuclear and Radiation Physics ResearchLaboratory,Department of Physics, Gauhati University, India)

Presenter : Mr. DEY, Kalyan (Department of Physics, Gauhati University, Deptartment of Physics, Bodoland University, India) ; Prof. BHATTACHARJEE, Buddhadeb (Nuclear and Radiation Physics Research Laboratory,Department of Physics, Gauhati University, India)



Submitted by : Mr. DEY, Kalyan


Last modified on : Friday 29 May 2015

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Strange behavior of rapidity dependent strangeness...


Abstract ID : 122

Formation of hypernuclei in relativisticion collisions

Content :

The production of hypernuclei in relativistic ion collisions, thatis adequate to future experiments at heavy-ion facilities, e.g., inDubna and Darmstadt, is under study. Within a hybrid approach we usetransport, coalescence and statistical models to describe the wholeprocess. We demonstrate that the origin of hypernuclei can beexplained by typical baryon interactions, that is similar to theproduction of conventional nuclei. In particular, heavy hypernucleiare coming mostly from projectile and target residues, whereaslight hypernuclei can be produced at all rapidities. The yields ofhypernuclei increase considerably above the energy threshold for theLambda-hyperon production, and there is a tendency to saturationof yields of hypernuclei with increasing the beam energy up to fewTeV. There are unique opportunities in relativistic ion collisionswhich are difficult to realize in traditional hypernuclear experiments:The produced hypernuclei have a broad distribution in masses andisospin. They can even reach beyond the neutron and proton drip-linesand that opens a chance to investigate properties of exotic hypernuclei.One finds also the abundant production of multi-strange nuclei, ofbound and unbound hypernuclear states with new decay modes. In addition,we can directly get an information on the hypermatter both at high andlow temperatures.

Primary authors : Dr. BOTVINA, Alexander (FIAS and INR-RAS)

Co-authors :

Presenter : Dr. BOTVINA, Alexander (FIAS and INR-RAS)



Submitted by : Dr. BOTVINA, Alexander



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Formation of hypernuclei in relativistic ion colli...


Abstract ID : 123

Strangeness production and long-rangecorrelations in pp collisions in string

fusion approachContent :

The effects of string fusion on the strange particles production in proton-proton collisions at high energy are studied in theframework of a Monte Carlo string-parton model, based on the picture of strings formation in elementary collisions ofcolor dipoles. The hardness of the elementary collisions is defined by a transverse size of the interacting dipoles.The interaction of strings is realized in the accordance with the string fusion model prescriptions by the introduction ofthe lattice in the impact parameter plane and taking into account the finite rapidity length of strings. The particles speciesdifferentiation is implemented according to Schwinger mechanism. The parameters of the model were fixed with theexperimental data on total inelastic cross section and charged multiplicity. In the framework of the model the chargedparticles spectra are calculated and compared with available data. The model is applied to the study of forward-backwardcorrelations in separated rapidity windows, taking into account strangeness, and predictions for the experiment areobtained.The authors acknowledge Saint-Petersburg State University for a research grant 11.38.242.2015.

Primary authors : KOVALENKO, Vladimir (Saint Petersburg State University)

Co-authors : VECHERNIN, Vladimir (Saint Petersburg State University)

Presenter : KOVALENKO, Vladimir (Saint Petersburg State University)



Submitted by : KOVALENKO, Vladimir



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Strangeness production and long-range correlations...


Abstract ID : 124

Search for the critical point in heavy-ioncollisions

Content :

This talk will discuss the status of the search for the critical point CP of strongly interacting matter. The structure of thephase diagram of strongly interacting matter can be explored by nucleus-nucleus collisions with an energy and system sizescan. The CP is expected as the endpoint of a first order phase transition line in a region of the phase diagram which isbelieved to be accessible by experiments at the CERN SPS and the beam energy scan BES at RHIC. Current results of theseprograms will be summarised.

Primary authors : Dr. SEYBOTH, Peter (jan kochanowski university kielce)

Co-authors :

Presenter : Dr. SEYBOTH, Peter (jan kochanowski university kielce)



Submitted by : Dr. SEYBOTH, Peter



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Search for the critical point in heavy-ion collisi...


Abstract ID : 125

Progress towards A Fixed-TargetExpeRiment at the LHC: AFTER@LHC

Content :

The multi-TeV LHC beams offer the possibility to perform the most energetic fixed-target experiments ever, in order tostudy with high precision pp, pd and pA collisions at 115 GeV as well as Pbp and PbA collisions at 72 GeV. In particular,AFTER@LHC – A Fixed-Target ExperRiment – can greatly complement [1] collider experiments, in particular that ofRHIC and EIC projects. We thus discuss the possibility of a multi-purpose fixed-target experiment using the p or Pb LHCbeams extracted by a bent crystal [2] along the lines of the LUA9 project [3] or using an internal gas target inspired fromthe SMOG system in LHCb [4].

We have evaluated that the instantaneous luminosity achievable with AFTER using typical targets would surpass that ofRHIC by more than3 orders of magnitude. This provides a quarkonium, prompt photon and heavy-flavour observatory [1, 5–7] in pp and pAcollisions where, byinstrumenting the target-rapidity region, gluon and heavy-quark distributions of the proton, the neutron and the nucleican be accessed at large x and even at x larger than unity in the nuclear case. In addition, the fixed-target mode has theadvantage to allow for spin measurements with polarized targets [8–10] over the full backward rapidity domain up to xF =1 [11]. The nuclear target-species versatility provides a unique opportunity to study the nuclear matter versus the hot anddense matter formed in heavy-ion collisions. Modern detection technology should allow for the study of quarkoniumexcited states, in particular χc and χb resonances thanks to the boost of the fixed-target mode [12].

In this talk, we will also show the results of the first fast simulations based on a LHCb-like detector used in thefixed-target mode at the LHC [13]. We will also discuss the connection with existing and future data from LHCb SMOG,which can be seen as a low-density internalgas target.

Primary authors : Dr. LANSBERG, Jean-philippe (IPN Orsay)

Co-authors : Dr. TRZECIAK, Barbara (Czech Technical University in Prague)

Presenter : Dr. LANSBERG, Jean-philippe (IPN Orsay) ; Dr. TRZECIAK, Barbara (Czech Technical University in Prague)



Submitted by : Dr. TRZECIAK, Barbara



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Progress towards A Fixed-Target ExpeRiment at the ...


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STRANGENESS IN QUARK MATTER 2... / Abstracts book Progress towards A Fixed-Target ExpeRiment at the ...


Abstract ID : 126

Scaling Properties of ParticleProduction, Azimuthal Anisotropy and

Two-pion Emission Source Radii inp+p, p+A, d+A and A+A Collisions

Content :

Extensive measurements of particle production, azimuthal anisotropy and pion emission source radii in A+A collisions,have provided invaluable insights on the expansion dynamics and the transport properties of the strongly interactingmatter produced in collisions at RHIC and the LHC. A crucial open question is whether a fundamental change occurs inthe reaction dynamics and the particle production mechanism, when the collision system-size is reduced from the valuesproduced in central and mid-central A+A collisions, to those obtained in p+p, p+A d+A, and peripheral A+A collisions.This question can be addressed via detailed complementary validation tests for similar scaling in p+p, p+A, d+A and A+ACollisions. The results from scaling tests of particle production, azimuthal anisotropy and two-pion emission source radiiin these systems, will be presented and discussed.

Primary authors : Prof. LACEY, Roy (Stony Brook University)

Co-authors :

Presenter : Prof. LACEY, Roy (Stony Brook University)



Submitted by : Prof. LACEY, Roy


Last modified on : Monday 04 May 2015

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Scaling Properties of Particle Production, Azimuth...


Abstract ID : 127

Relative polarization of Lambdahyperon pairs in the SELEX experimentContent :

Spin composition of the $\Lambda\Lambda$ and $\bar\Lambda\bar\Lambda$ hyperon pairs depending on relative4-momentum of the pair was measured.

Measurement of the relative polarisation of identical particle pairs allows to determine space-time parameters of thegeneration region and provides more data for hydrodynamic model development. When particle decays in the weakchannel, such measurement is possible even for unpolarised targets and beams due to P-parity violation in a weak decay.

Data were taken from the SELEX experiment made at the Tevatron accelerator at the Fermi National AccelerationLaboratory (Fermilab). Events collected on $\Sigma^-$ beam with the mean energy 600 GeV were analysed.Presented results are based on the experimental data correction obtained from the Pythia-6 powered baseline.

Primary authors : Mr. SAVCHENKO, Andrey (National Research Nuclear University "MEPHI")

Co-authors :

Presenter : Mr. SAVCHENKO, Andrey (National Research Nuclear University "MEPHI")



Submitted by : Mr. SAVCHENKO, Andrey



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Relative polarization of Lambda hyperon pairs in t...


Abstract ID : 128

Renormdynamics and HadronizationContent :

Independently radiating valence quarks and corresponding negative binomial distribution presents phenomenologicallypreferable mechanism of hadronization in multiparticle production processes. Main properties of the renormdynamics,corresponding motion equations and their solutions are considered.

Primary authors : Dr. MAKHALDIANI, Nugzar (JINR)

Co-authors :

Presenter : Dr. MAKHALDIANI, Nugzar (JINR)



Submitted by : Dr. MAKHALDIANI, Nugzar



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Renormdynamics and Hadronization


Abstract ID : 129

Energy scan of correlations in p+p andBe+Be from NA61/SHINE

Content :

The existence of the critical point(CP) of strongly interacting matter isstill an open problem. An extensive strong interactions program includingsearch of the CP and study of the onset of deconnement was started by theNA61/SHINE at SPS at CERN. Two dimensional phase diagram scan isexpected to give more insight into the CP location and to shed the lighton the phase transition region. This program includes studies of hadron production in proton-proton, proton-nucleus andnucleus-nucleus interactions measured in wide range of colliding energy and system size. Correlations between variousobservables measured at midrapidity as wellas in separated rapidity intervals are considered as an additional andsensitive tool of this phase diagram scan. We present here the NA61/SHINEcorrelation program: the results of studies of the energy dependenceof two-paticle correlations of transverse momentum and multiplicity in p+pand Be+Be collisions measured at the SPS and the first results on correlations between observables in Be+Be at 150GeV/cobtained for the separted pseudo-rapidity intervals (so called long-range correlations). Comparison with data from the MCgenerators are also discussed.The author acknowledges Saint-Petersburg State University for a research grant 11.38.242.2015

Primary authors : Mr. SERYAKOV, Andrey (St.Petersburg State University)

Co-authors :

Presenter : Mr. SERYAKOV, Andrey (St.Petersburg State University)



Submitted by : Mr. SERYAKOV, Andrey



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Energy scan of correlations in p+p and Be+Be from ...


Abstract ID : 130

Fluctuations in Strong-Coupling HeavyQuark Energy Loss

Content :

Leading order calculations of heavy quark energy loss using the AdS/CFT correspondence overpredict the measuredsuppression of D mesons. Including next-to-leading order effects from the thermal fluctuations of the sQGP medium,however, leads to predictions consistent with measured heavy flavor electrons, D, and B suppression at RHIC and LHC.Taken with recent strong-coupling calculations of jet suppression that are consistent with preliminary CMS data, one mayconstruct a self-consistent picture of strong-coupling dynamics of quark-gluon plasma in heavy ion collisions.

Primary authors : Dr. HOROWITZ, William (University of Cape Town)

Co-authors :

Presenter : Dr. HOROWITZ, William (University of Cape Town)



Submitted by : Dr. HOROWITZ, William



Comments :I'm not sure if the abstract deadline is April 12 or April 24. The emails said April 12, but thewebsite said April 24. If the deadline was April 12, I apologize for submitting late. Thankyou very much for considering my submission.

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Fluctuations in Strong-Coupling Heavy Quark Energy...


Abstract ID : 133

pQCD short path length corrections to(D)GLV energy loss in the QGP

Content :

At Hard Probes 2013, the ALICE collaboration showed a high-pT R_pA of ~1.5. At Quark Matter 2014, ALICEdemonstrated collective behaviour in the low-pT particles in these same pA collisions, indicating the creation of a hot,fluid-like QGP medium. The twin identifications of high-pT enhancement and low-pT collective behaviour in suchshockingly small systems calls for a detailed theoretical energy loss analysis. In 2008, the GLV energy loss formulae weregeneralized for heavy quarks. We study the way in which energy is dissipated in the QGP created in pA collisions bycalculating, in pQCD, the short path length corrections to the now well-known (D)GLV energy loss formulae for heavyquarks that have produced good predictions for AA collisions.

Primary authors : Ms. KOLBE, Isobel (University of Cape Town)

Co-authors : Dr. HOROWITZ, William (University of Cape Town)

Presenter : Ms. KOLBE, Isobel (University of Cape Town)



Submitted by : Ms. KOLBE, Isobel



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STRANGENESS IN QUARK MATTER 2... / Abstracts book pQCD short path length corrections to (D)GLV energ...


Abstract ID : 134

Hadron resonances in the medium viaelectromagnetic probes

Content :

Due to their penetrating nature electromagnetic probes (dileptons and photons) provide important information on theproperties of the hot and dense partonic and hadronic medium created in relativistic heavy-ion collisions.

It has been found that a proper description of hadronic resonances, particularly baryon resonances, in both the vacuumand the hot and dense medium are of prime importance to understand the findings in heavy-ion experiments at a largerange of collision energies. In this talk, I shall give a review about the most recent activities in theory to describeelectromagnetic probes through a realistic description of the bulk-medium evolution within a coarse-grained transportmodel on the one hand and dilepton-emission rates from a hot and dense medium undergoing a transition from a partonicQGP to a hadron-resonance gas state on the other hand.

Primary authors : Dr. VAN HEES, Hendrik (Goethe University Frankfurt and FIAS)

Co-authors :

Presenter : Dr. VAN HEES, Hendrik (Goethe University Frankfurt and FIAS)



Submitted by : Dr. VAN HEES, Hendrik



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Hadron resonances in the medium via electromagneti...


Abstract ID : 135

High statistics measurements ofazimuthal flows in Au+Au collisions at

sqrt{s_{NN}} = 2.4 GeVContent :

We present our preliminary results on azimuthal flow anisotropy of protons, deuterons and tritons produced in fixedtarget collisions of Au+Au at 1.23 GeV/u kinetic beam energy.The experiment was performed in 2012 with the HADES setup at GSI Darmstadt with unprecedentedly high accumulatedstatistics. It allowed for anisotropic azimuthal flow measurements based on an event reaction plane estimation usingprojectile spectators measured with a forward scintillator hodoscope.Our preliminary analysis of azimuthal flows of light hydrogen nuclei allows us to extract not only directed (v1) andelliptic (v2) flow harmonics but it also indicates a measurable contribution from triangular (v_3) and quadrangular (v_4)flow components at a collision energy of sqrt(s_{NN}) = 2.4 GeV.

Primary authors : Dr. SADOVSKY, Alexander (INR RAS)

Co-authors :

Presenter : Dr. SADOVSKY, Alexander (INR RAS)



Submitted by : Dr. SADOVSKY, Alexander



Comments :(A.Sadovsky for the HADES collaboration)

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STRANGENESS IN QUARK MATTER 2... / Abstracts book High statistics measurements of azimuthal flows in...


Abstract ID : 136

Production of Multi-Strange hyperonsat FAIR energies

Content :

Nuclear collisions in a wide energy range, 5-40A GeV, may produce net-baryon density ~ 5-6 times the normal nuclearmatter density. At such high densities, quarks of nucleons exist in a deconfined partonic state. Such a state will beexplored experimentally at the upcoming Facility for the Antiproton and Ion Research (FAIR). In such collisions,production of multi-strange hadrons will play a major role in investigating the characteristics of the medium. Enhancedproduction of strange quarks and therefore, of (anti)hyperons is believed to be an important signature of the formation ofpartonic medium.The yields of (anti)hyperons and their relative enhancement with respect to pions have been investigated in the FAIRenergy region using the hadronic-string model (UrQMD), hadronic and partonic modes of the transport model (AMPT)and a statistical hadronization model (Therminator). It is seen that multi-strange (anti)hyperons are very sensitive to thepartonic medium and the enhancement is very dominant at lower energies, in the FAIR SIS100 energy regime.

Primary authors : Ms. HUSHNUD, Jahan (Aligarh Muslim university, Aligarh)

Co-authors : Mr. AHMAD, Shabir (Kashmir University) ; Dr. CHATTOPADHYAY, Subasis (VECC,Kolkata,India) ; Prof. SENGER, Peter (GSI, Germany, Darmstadt)

Presenter : Ms. HUSHNUD, Jahan (Aligarh Muslim university, Aligarh)



Submitted by : Ms. HUSHNUD, Jahan



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Production of Multi-Strange hyperons at FAIR energ...


Abstract ID : 137

Energy dependence of fluctuations inp+p and Be+Be collisions from

NA61/SHINE.Content :

The main aims of the NA61/SHINE experiment are to discover the critical point of strongly interaction matter and to studythe properties of the onset of deconfinement. For this goal the scan through two dimensional phase diagram (T-mu_B) isbeing performed at the SPS by measurements of hadron production in proton-proton, proton-nucleus and nucleus-nucleusinteractions as a function of collision energy and system size. It is supposed that fluctuations of different dynamicalquantities will increase close to the critical point and this effect could be observed in this 2D scan.

In this report we present the recent results of measurements of fluctuations in p+p and Be+Be collisions at SPS energies.Comparison with the model predictions and the corresponding data of other experiments will be shown and discussed.

Acknowledgements: this work was partially supported by the the Federal Agency of Education of the Ministry ofEducation and Science of the Russian Federation (SPbSU research grant 11.38.193.2014).

Primary authors : ANDRONOV, Evgeny (Saint Petersburg State University)

Co-authors :

Presenter : ANDRONOV, Evgeny (Saint Petersburg State University)



Submitted by : ANDRONOV, Evgeny



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Energy dependence of fluctuations in p+p and Be+Be...


Abstract ID : 138

Search of strangelets and “forward”physics on the collider

Content :

Search of strangelets and “forward” physics on the colliderA.B.Kurepin, Institute fir Nuclear Research, Moscow

A new stage of the collider experiments at the maximum energy of protons and nuclei may lead to the discovery of newphenomena, as well as to confirm the effects previously observed only at very high energies in cosmic rays. A specificprogram of the experiments is so-called “forward” physics, i.e. the study of low-angle processes. For the CMS projectCASTOR and TOTEM detectors are created. On installation ALICE a new detector system ADA and ADC iscommissioned. Of the most interesting phenomena can be noted the detection in cosmic rays events called CENTAUROand particles with abnormally high range. CENTAURO represent events with small multiplicity and with a strongsuppression of electromagnetic component. Also some hadron-rich events are accompanied by the presence of stronglypenetrating component. Some of the models associate CENTAURO with the appearance of events with an unusualhadronization of quark-gluon matter, which is formed by the collision of nuclei, with the suppression of u-anti u andd-anti d quarks, with an increase of the s –anti s quarks proportion and further production of strange matter - strangelets.Since the energy of the beams at the collider and kinematic parameters of the forward detectors CASTOR and TOTEM(CMS) and the ADA and ADC (ALICE) are close to the parameters and energies of abnormal events in cosmic rays, it ispossible to reproduce and investigate in detail these events in the laboratory. In the measurements planned for the comingrun 2 of collider with a maximum energy of protons and nuclei, it is necessary to ensure the detection of hadrons andgamma rays using the whole complex of the forward detectors. Separation of hadrons and gamma rays will be providedby longitudinal segmentation of the detector CASTOR. Although the forward detectors ADA and ADC are mainly focusedon the analysis of diffractive events, one can look for events with low multiplicity and very high rapidity for centralcollisions allocated by the trigger detectors T0 and V0.

Summary :

The review of the planned experiments for the search of strangelets is presented

Primary authors : Prof. KUREPIN, Alexey (Institute for Nuclear Research, Moscow)

Co-authors :

Presenter : Prof. KUREPIN, Alexey (Institute for Nuclear Research, Moscow)



Submitted by : Prof. KUREPIN, Alexey



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Search of strangelets and “forward” physics on th...



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Search of strangelets and “forward” physics on th...


Abstract ID : 140

Study on initial geometry fluctuationsvia correlation of finite distributions of

secondary particles in nucleus-nucleusinteractions

Content :

The dynamics of the interaction of nuclei is depended on not only by the energy and mass of the interacting nuclei, butalso on the geometry of the colliding nuclei. Accounting of the influence of fluctuations of the initial states in individualinteractions allows to explore the true dynamic correlations of the final state of interactions of excited hadronic systems.The study of the peculiarities of the distribution of secondary particles depending on the degree centrality and the degreeof asymmetry of the interacting nuclei, is performed. The number of multicharged fragments of the projectile nucleus(N_f) in interactions of sharply asymmetric nuclei depends on the centrality degree of interaction. In the majority ofperipheral interactions N_f is equal 1. In the most of the central interactions there are N_f > 1 or N_f =0. At that, theevents with N_f =1 are separated clearly in the distribution of the total charge of the fragments of a projectile nucleus (Q)depending on the nature of the correlation of the number of fragments of the target nucleus (N_h) and the multiplicity ofsecondary particles from interaction area (n_s). The peak in the field of the maximum values Q characterizes peripheralevents with various degree of the perifericos on a growing branch of average N_h-n_s curve. And the peak in the field ofsmall values Q characterizes the central events with various degree of centrality on the decreasing branch of averageN_h-n_s curve.

Primary authors : Dr. LEBEDEV, Igor (Institute of Physics and Technology)

Co-authors : Mrs. FEDOSIMOVA, Anastasia (Institute of Physics and Technology) ; Dr.GAITINOV, Adigam (Institute of Physics and Technology) ; Dr. TEMIRALIEV, Abzal(Institute of Physics and Technology)

Presenter : Dr. LEBEDEV, Igor (Institute of Physics and Technology)



Submitted by : Dr. LEBEDEV, Igor



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Study on initial geometry fluctuations via correla...


Abstract ID : 141

On the pair correlations of neutral K, D,B and B_s mesons with close momenta

produced in inclusive multiparticleprocesses

Content :

The phenomenological structure of inclusive cross-sections of theproduction of two neutral $K$ mesons in hadron--hadron, hadron--nucleusand nucleus--nucleus collisions is theoretically investigated takinginto account the strangeness conservation in strong and electromagneticinteractions. Relations describing the dependenceof the correlations of two short-lived and two long-lived neutral kaons$K^0_S K^0_S$, $K^0_L K^0_L$ and the correlations of "mixed" pairs$K^0_S K^0_L$ at small relative momenta upon the space-time parametersof the generation region of $K^0$ and $\bar{K}^0$ mesonshave been obtained. These relations involve the contributionsof Bose-statistics and $S$-wave strong final-state interactionof two $K^0$ ($\bar{K}^0$) mesons as well as of a $K^0$ and$\bar{K}^0$ mesons, and also the additional contribution of transitions$K^+ K^- \rightarrow K^0 \bar{K}^0$, and they depend upon therelative fractions of generated pairs $K^0 K^0$, $\bar{K}^0 \bar{K}^0$and $K^0 \bar{K}^0$. It is shown that under the strangenessconservation the correlation functions ofthe pairs $K^0_S K^0_S$ and $K^0_L K^0_L$, produced in the sameinclusive process, coincide, and the difference between thecorrelation functions of the pairs $K^0_S K^0_S$ and $K^0_S K^0_L$is conditioned exclusively by the production of the pairs of non-identicalneutral kaons $K^0 \bar{K}^0$.

For comparison, analogous correlations for the pairsof neutral heavy mesons $D^0$, $B^0$ and $B_s^0$, generated inmultiple inclusive processes with the charm (beauty) conservation,are also theoretically analyzed -- neglecting, just as for thecase of $K^0$ mesons, the weak effects of CP violation. These correlations have the quite analogous character and they aredescribed by quite similar expressions: in particular, justas for $K^0$ mesons, the correlationfunctions for the pairs of states with the same $CP$ parity($R_{SS}=R_{LL}$) and with different $CP$ parity ($R_{SL}$)do not coincide, and the difference between them is conditionedexclusively by the production of pairs $D^{0}\bar{D}^{0}$,$B^{0}\bar{B}^{0}$ and $B_s^{0}\bar{B}_s^{0}$ .However, contrary to the case of $K^0$ mesons, here the distinction of$CP$-even and $CP$-odd states ( and, hence, the experimentalobservation of these correlations ) encounters difficulties --due to the insignificant differences of lifetimes of these statesand the relatively small probability of purely $CP$-evenand $CP$-odd decay channels. Nevertheless, one may expect that it will become possible at future colliders.

STRANGENESS IN QUARK MATTER 2... / Abstracts book On the pair correlations of neutral K, D, B and B_...


Primary authors : Dr. LYUBOSHITZ, Valery (Joint Institute for Nuclear Research ( Dubna ))

Co-authors : Dr. LYUBOSHITZ, Vladimir (Joint Institute for Nuclear Research, Dubna)

Presenter : Dr. LYUBOSHITZ, Valery (Joint Institute for Nuclear Research ( Dubna ))

Track classification : Heavy flavor production and transport (R. Rapp, Texas A&M; / H. Van Hees,Frankfurt) ; Strangeness production (B. Mueller, Duke / H. Stoecker, Frankfurt& GSI )


Submitted by : Dr. LYUBOSHITZ, Valery



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STRANGENESS IN QUARK MATTER 2... / Abstracts book On the pair correlations of neutral K, D, B and B_...


Abstract ID : 142

Hadroproduction of varphi-mesons inthe Quark-Gluon String model

Content :

We consider the experimental data on varphi-meson production inhadron-nucleon collisions for a wide energy region. The Quark-Gluon String Model quantitatively describes the spectra ofsecondary varphi, as well as the ratios of varphi/pi- and varphi/$K- production crosssections.

Primary authors : Prof. MERINO, Carlos (University of Santiago de Compostela (Spain))

Co-authors : Prof. ARAKELYAN, Gevorg H. (A.Alikhanyan National Scientific Laboratory-YerevanPhysics Institut, Armenia) ; Prof. SHABELSKI, Yuli M. (Petersburg Nuclear PhysicsInstitute-NCR Kurchatov Institute, Gatchina, St.Petersburg, Russia)

Presenter : Prof. MERINO, Carlos (University of Santiago de Compostela (Spain))

Track classification : Scientific Programme ; Strangeness production (B. Mueller, Duke / H.Stoecker, Frankfurt & GSI )


Submitted by : Prof. MERINO, Carlos



Comments :PRD 90 (2014) 11, 114019, and arXiV:1407.7387[hep-ph]

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Hadroproduction of varphi-mesons in the Quark-Gluo...


Abstract ID : 143

Strangeness evolution at FAIRenergies

Content :

Event by event fluctuations of particle multiplicities and their ratios are considered to be sensitive probes to the exoticphenomena in high energy heavy ion collisions like phase transtion or the occurence of critical point. These phenomenamight take place at different time after the collision based on fulfilling the required conditions at a particular time.Fluctuations are therefore expected to show non-monotonic behaviour at the of time of occurence of these phenomena.Experimentally, fluctuations are measured at freezeout. In this work, using the hybrid version of the UrQMD eventgenerator, we have investigated the propagation of fluctuations of kaon and pion particle multiplicities, their ratio($K/\pi$) in AuAu collisions at E$_{lab} < $ 90 AGeV. Two commonly used experimental measures i.e., $\sigma^2$/meanand $\nu_{dyn}$ have been used in the analysis in a given acceptance. The hybrid model, i.e., UrQMD with hydrodynamicevolution has been used to study the effect of hydrodynamic evolution on these conventional fluctuation measures.

Summary :

It is observed that the fluctuations as measured by $\sigma^2$/mean and $\nu_{dyn}$ gets reduced considerably atfreezeout. The dominat structures present at the initial stage of the evolution get smoothen out. However, the energydependence of the fluctuations remain preserved till the freezeout. The hydrodynamic evolution of the model with chiralequation of state shows considerably higher fluctuation at lower collision energy as compared to pure hadronic transportversion or the hybrid version with hadronic equation of state.

Primary authors : Mr. AHMAD, Shabir (University of Kashmir, Srinagar India)

Co-authors : Dr. MIR, Farooq (Univeristy of Kashmir, Srinagar India) ; Ms. BASHIR, Suraya(University of Kashmir, Srinagar India) ; Ms. JAHAN, Hushnud (Aligarh Muslim University,Aligarh UP India) ; Mr. CHATTOPADHYAY, Subhashis (Variable Energy Cyclotron Center,Kolkata India)

Presenter : Mr. AHMAD, Shabir (University of Kashmir, Srinagar India)



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Strangeness evolution at FAIR energies


Abstract ID : 144

Features of triangular flow of strangeand non-strange hadrons at LHC

Content :

Triangular flow of strange (charged kaons, (anti-)Lambdas, phi-mesons)and non-strange hadrons in Pb+Pb collisions at LHC energies is studiedwithin the HYDJET++ model, which combines hard processes in a hot anddense partonic medium with parametrized hydrodynamics. Together with anextensive table of resonances, this circumstance enables us toinvestigate (i) the interplay between hard and soft processes and (ii)between jets and final-state interactions. Jets are found to be the mainreason for violation of the NCQ scaling for v_3 at LHC, whereas decaysof resonances improve the scaling fulfillment. Comparison with theexperimental data is performed.

Primary authors : Dr. ZABRODIN, Evgeny (Department of Physics, University of Oslo)

Co-authors : Ms. CRKOVSKA, Jana (Faculty of Nuclear Sciences and Physical Engineering,Czech Technical University in Prague, Czech Republic) ; Prof. BRAVINA, Larissa(Department of Physics, University of Oslo, Norway) ; Mr. BRUSHEIM JOHANSSON,Bengt Henrik (Department of Physics, University of Oslo, Norway) ; Dr. EYYUBOVA,Gyulnara (Faculty of Nuclear Sciences and Physical Engineering, Czech TechnicalUniversity in Prague, Czech Republic and SINP MSU, Russia)

Presenter : Dr. ZABRODIN, Evgeny (Department of Physics, University of Oslo)



Submitted by : Dr. ZABRODIN, Evgeny



Comments :I would like to present our results concerning the study of triangular flow in Pb+Pbcollisions at LHC energies. The results are fresh, and the paper will be submitted forpublication within couple of weeks.

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Abstract ID : 145

Particle correlators and possible localparity violation in nuclear collisions

Content :

The complex topology structure of the vacuum of quantum chromodynamics (QCD) can leads to local violation of theCP-invariance of strong interactions. The preliminary estimations of correlators within the model of chiral magnetic effectare presented for types of nuclei and collision energies corresponded to RHIC and the LHC beams. These correlatorscharacterized the asymmetry of the emission of charged particles with respect to the reaction plane in non-centralnucleus-nucleus collisions are calculated for two various nuclear densities, namely, for approach of hard sphere and fortwo-component Fermi model. The centrality dependence is under consideration for correlators integrated over otherkinematic parameters. The correlator magnitudes depend on collision energy weekly for symmetric Cu+Cu, Au+Au,Pb+Pb and U+U collisions. The same sign correlator shows noticeable increasing with growth of atomic number forsymmetric collisions. Also centrality dependence of correlator is obtained for asymmetric Cu+Au collisions.

Primary authors : Mr. PARFENOV, Peter (Evgenievich) ; Dr. OKOROKOV, Vitali (Alekseevich)

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Presenter : Mr. PARFENOV, Peter (Evgenievich)



Submitted by : Mr. PARFENOV, Peter



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Particle correlators and possible local parity vio...


Abstract ID : 146

Forward-backward correlations withstrange particles in PYTHIA event

generatorContent :

We present studies of strange particle yields and correlations in pp collisions in PYTHIA8 and PYTHIA6 event generatorsusing the method of forward- backward correlations. Several key processes that give rise to these correlative effects areidentified and manipulated to probe the fundamental properties of strange particle emitting sources. The sensitivity ofstrange particle production and correlations to PYTHIA’s multiparton interaction, color reconnection, and explicitstrangeness suppression are shown. These processes are manipulated to adjust the short and long-term components ofparticle production correlations in simulation. Motivation for further experimental research of forward-backwardcorrelations with strange particles in pp collisions is given.Acknowledgements. This work is supported for I.A. and G.F. by the Saint- Petersburg State University research grant11.38.242.2015.

Primary authors : Mr. GILLIES, Ewen (University of Edinburgh, UK) ; Dr. FEOFILOV, Grigory(Saint-Petersburg State University) ; Dr. ALTSYBEEV, Igor (Saint-PetersburgState University)

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Presenter : Dr. ALTSYBEEV, Igor (Saint-Petersburg State University)



Submitted by : Dr. ALTSYBEEV, Igor



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Forward-backward correlations with strange particl...


Abstract ID : 147

Dynamical upsilon-suppression in thestochastic-Schroedinger approach

Content :

The suppression of upsilon states in Pb-Pb collisions recently observed by the CMS collaboration at LHC, is one of themost convincing evidence for the creation of a deconfined state of matter, the quark gluon plasma. The precise survival ofexcited states vs ground state could even allow to measure the highest temperature reached in those collisions, accordingfor instance to the sequential suppression picture which is substantiated by calculations of the dissociation temperaturebased on QQbar lattice potentials evaluated at finite temperature.

In our contribution, we have chosen to address the question of psilon dissociation resorting to a more dynamical approach,i.e. the non-linear stochastic-Schroedinger equation (SSE). In this scheme, the time-dependent real potential reflects thescreening while the stochastic forces express (hard) interactions between QGP and the QQbar state, possibly leading toinstantaneous dissociation. The stochastic-Schroedinger equation preserves unitarity and enables to treat the transitionsbetween bound and open quantum states, which are mocked up resorting to effective imaginary potential in othertreatments. It allows to consider a realistic compact initial state, made of a linear superposition of upsilon eigenstates andto preserve quantum coherence in the time-evolution of the QQbar pair.

After describing the various ingredients of our model as well as some of its most important properties -- like the questionof asymptotic thermalization -- we will present the suppression prediction resulting from the SSE embedded in state of theart evolution scenario of the QGP background.

Primary authors : Mr. KATZ, Roland (Subatech)

Co-authors : Prof. GOSSIAUX, Pol-bernard (Subatech)

Presenter : Mr. KATZ, Roland (Subatech)



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Dynamical upsilon-suppression in the stochastic-Sc...


Abstract ID : 148

Possible effect of mixed phase anddeconfinement upon spin correlationsin the $\Lambda \bar{\Lambda}$ pairs

generated in relativistic heavy-ioncollisions

Content :

Spin correlations for the $\Lambda \Lambda$ and$\Lambda \bar{\Lambda}$ pairs, generated in relativisticheavy ion collisions, and related angular correlations at thejoint registration of hadronic decays of two hyperons withspace parity nonconservation are theoretically analyzed.These correlations give important information about thecharacter and mechanism of multiple processes, and theadvantage of the$\Lambda \Lambda$ and $\Lambda \bar{\Lambda}$ systems overother ones is conditioned by the fact that the $P$-odd decays$\Lambda \rightarrow p + \pi^-$ and$\bar{\Lambda} \rightarrow \bar{p} + \pi^+$ serve as effectiveanalyzers of spin states of the $\Lambda$ and $\bar{\Lambda}$particles. The correlation tensor components can be derived bythe method of "moments" -- as a result of averaging thecombinations of trigonometric functions of the proton ( antiproton ) flight angles over the double angular distribution ofproducts of two decays. The properties of the "trace" $T$ of the correlationtensor ( a sum of three diagonal components ), determining theangular correlations as well as the relative fractions of the triplet states and singlet state of respective pairs, are discussed.

In the present report, spin correlations for twoidentical particles ($\Lambda \Lambda$) and two non-identicalparticles ($\Lambda \bar{\Lambda}$) are generally consideredfrom the viewpoint of the conventional model of one-particlesources. In the framework of this model, correlations vanishat enough large relative momenta. However, under theseconditions -- especially at ultrarelativistic energies -- inthe case of two non-identical particles ($\Lambda \bar{\Lambda}$)the two-particle annihilation sources( two-quark, i.e. quark--antiquark, and two-gluon ones ) startplaying a noticeable role and lead to the difference of thecorrelation tensor from zero. In particular, such a situationmay arise, when the system passes through the "mixed phase"and -- due to the multiple production of free quarks and gluonsin the process of deconfinement of hadronic matter --the number of two-particle sources strongly increases.

Primary authors : Dr. LYUBOSHITZ, Valery (Joint Institute for Nuclear Research ( Dubna ))

STRANGENESS IN QUARK MATTER 2... / Abstracts book Possible effect of mixed phase and deconfinement u...


Co-authors : Dr. LYUBOSHITZ, Vladimir (Joint Institute for Nuclear Research, Dubna)

Presenter : Dr. LYUBOSHITZ, Valery (Joint Institute for Nuclear Research ( Dubna ))



Submitted by : Dr. LYUBOSHITZ, Valery



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Possible effect of mixed phase and deconfinement u...


Abstract ID : 149

Towards the quark-gluonic Equation ofState including strange and charmed

quarks with realistic massesContent :

We present results for the equation of state (EoS) of quark-gluon matter obtained in our project for a lattice study of QCDthermodynamics with two generations of dynamical quarks. We employ the Wilson twisted mass implementation forfermionic fields and use in the gauge sector the improved Iwasaki gauge action. The fixed-scale approach is used withthree lattice spacings and charged pion mass fixed around 370 MeV. The values for pseudocritical temperature wereobtained from the chiral susceptibility and subtracted chiral condensate analysis. We compare our equation of state withinclusion of the heavier doublet with analogous results obtained with only N_f=2 degenerate light flavours.

Primary authors : BURGER, Florian (Humboldt-Universitaet zu Berlin) ; ILGENFRITZ,Ernst-michael (BLTP JINR) ; LOMBARDO, Maria Paola (Laboratori Nazionali diFrascati, INFN and Istituto Nazionale di Fisica Nucleare) ;MUELLER-PREUSSKER, Michael (Humboldt-Universitaet zu Berlin) ; TRUNIN,Anton (BLTP JINR)

Co-authors :

Presenter : TRUNIN, Anton (BLTP JINR)



Submitted by : TRUNIN, Anton



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Towards the quark-gluonic Equation of State includ...


Abstract ID : 151

Hyperon production in heavy ioncollisions. The role of initial state in

"horn"-effectContent :

A new mechanism is proposed for interpretation of the non-monotonic,enhanced yield of hyperons and positive strange mesons (also knownas "horn" effect) that was observed in central heavy ion collisionsin the experiment NA49 at SPS and later confirmed by Beam EnergyScan (BES) program of STAR collaboration at RHIC. We argue that thedata indicate the transition of the nucleons in the overlap regionof colliding nuclei with high nuclear density into a certain hyperonphase. This nucleon-to-hyperon transition is accompanied by enhancedyields of positive and neutral kaons. The "horn"-effect is aconsequence of an interplay between the energy/baryon densityattained in the overlap region of colliding nuclei and the overlaptime. According to the proposed mechanism the same effect should beobserved for the yield of neutral kaons as well.

In semi-central heavy ion collisions a strong magnetic field andvery large orbital angular momentum can be created. Possible"global" polarization of hyperons (created by abovenucleon-to-hyperon transition mechanism) induced by these phenomenais discussed.

Primary authors : Dr. MUSULMANBEKOV, Genis (JINR, LIT)

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Presenter : Dr. MUSULMANBEKOV, Genis (JINR, LIT)



Submitted by : Dr. MUSULMANBEKOV, Genis



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Abstract ID : 152

Thermodynamics of QCD basedmodified gravity

Content :

Accelerated expansion of the current universe is well-established by cosmological observations obtained with SupernovaeIa (SNeIa), the Cosmic Microwave Background (CMB) radiation anisotropies, the Large Scale Structure (LSS) and X-rayexperiments and is well-documented in literature. A missing energy component also dubbed as Dark Energy (DE)characterized by negative pressure is widely considered by scientists as responsible of this accelerated expansion. Theissues related to QCD ghost dark energy are discussed in Urban and Zhitnitsky (2010a) and Ohta (2011). The QCD ghost(responsible for the solution of the UA(1) problem) plays a crucial role in the computation of the vacuum energy, becausethe ghost’s properties do not deviate significantly at very large but finite distances (Urban and Zhitnitsky, 2010b).Considering power-law for of scale factor in a flat FRW universe we reported areconstruction scheme for f(G) gravity based on QCD ghost dark energy. We reconstructed the effective equation of stateparameter and observed “quintessence” behavior of the equation of state parameter. Furthermore, considering dynamicalapparent horizon as the enveloping horizon of the universe we have observed that the generalized second law ofthermodynamics is valid for this reconstructed f(G) gravity.

Summary :

In the present study we have presented a reconstruction scheme for f(G) gravity, where G represents Gauss-Bonnetinvariant and we have chosen the scale factor in power-law form. Considering a flat FRW universe, we have considered acorrespondence between f(G) gravity and QCD ghost dark energy. After getting a reconstructed solution for f(G) we haveplotted f(G)against G, where it is apparent that f(G) → 0 as G → 0, which is one of the sufficient conditions for a realistic model. Wehave plotted the effective equation of state parameter for n > 1 and observed that effective EoS ≥ − 1 i.e. it behaves likequintessence. For n ≈ 2, EoS is reaching −1 at late stage of the universe. However, it is not crossing the phantom boundary.Subsequently, considering dynamical apparent horizon as the enveloping horizon of the universe we have derivedexpression for the time derivative of total entropy and we have observed that S˙ total > 0 throughout the evolution of theuniverse. This indicated validity of the generalized second law of thermodynamics under this QCD reconstruction of f(G)gravity.

Primary authors : Dr. CHATTOPADHYAY, Surajit (Pailan College of Management andTechnology, Kolkata)

Co-authors :

Presenter : Dr. CHATTOPADHYAY, Surajit (Pailan College of Management and Technology, Kolkata)



Submitted by : Dr. CHATTOPADHYAY, Surajit



Comments :Dear Sir/Madam, Kindly consider the attached Abstract for presentation in the conference. If you kindly let me know your kind decision as soon as possible I shall be highly obliged. Actually, if it is

STRANGENESS IN QUARK MATTER 2... / Abstracts book Thermodynamics of QCD based modified gravity


accepted I shall apply to Govt of India for financial support. That is a multi-step process. Ishall not be able to apply unless I have an acceptance letter. If you kindly accept thispaper please send a formal acceptance letter because that would be needed for financialsupport. With regards, Dr. Surajit Chattopadhyay India

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Thermodynamics of QCD based modified gravity


Abstract ID : 153

A quantum chromodynamics basedreconstruction scheme for f(T) gravity

in flat FRW universeContent :

Here I report a reconstruction scheme for f(T) gravity based on QCD ghost dark energy. Two models of f(T) have beengenerated and the pressure and density contributions due to torsion have been reconstructed. Two realistic models havebeen obtained and the effective equations of state have been studied. Also, the squared speed of sound has been studied toexamine the stability of the models.

Summary :

Accelerated expansion of our universe, as evidenced by Supernovae Ia (SNeIa), Cosmic Microwave Background (CMB)radiation anisotropies, Large Scale Structure (LSS) and X-ray experiments, is well documented in literature. Amissing energy component, also known as Dark Energy (DE) with negative pressure, is widely considered by scientists asthe responsible of this accelerated expansion. A DE model, so-called Veneziano ghost DE (GDE), has been proposed in [1].The key ingredient of this new model is that the Veneziano ghost, which is unphysical in the usual Minkowski spacetimequantum field theory (QFT), exhibits important physical effects in dynamical spacetime or spacetime with non-trivialtopology. Veneziano ghost is supposed to exist for solving the U(1) problem in the low-energy effective theory of QCD [2].Although in the flat Minkowski spacetime the QCD ghosts are unphysical and make no contribution, incurved/time-dependent backgrounds, the cancellation of their contribution to the vacuum energy leave a small energydensity.References:[1] F.R. Urban, A.R. Zhitnitsky, Phys. Lett. B 688, 9 (2010).[2] R.-G. Cai, Z.-L. Tuo, H.-B. Zhang, Q. Su, Phys. Rev. D 84, 123501 (2011).

Primary authors : Dr. CHATTOPADHYAY, Surajit (Pailan College of Management andTechnology, Kolkata)

Co-authors :

Presenter : Dr. CHATTOPADHYAY, Surajit (Pailan College of Management and Technology, Kolkata)



Submitted by : Dr. CHATTOPADHYAY, Surajit



Comments :Dear Sir/Madam, Kindly consider the attached abstract for presentation in your esteemed conference. If you kindly let me know your decision I shall be highly obliged. Actually, if you kindly accept the abstract, I shall have to apply to Govt of India for financial support. That is a multi-step process and they will not consider my application unless I can produce a formal acceptance letter. With warm regards,

STRANGENESS IN QUARK MATTER 2... / Abstracts book A quantum chromodynamics based reconstruction sche...


Dr. Surajit Chattopadhyay India

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STRANGENESS IN QUARK MATTER 2... / Abstracts book A quantum chromodynamics based reconstruction sche...


Abstract ID : 154

QGP away from thermal saturation andgluon condensation

Content :

The quark-gluon plasma produced in heavy ion collisions seems to thermalize rapidly. However, if parton numberchanging processes are not fast enough, a transient equilibrium state might be reached that is characterized not only bylocal temperature, collective flow and (quark) chemical potential, but also by a gluon chemical potential describingover/undersaturation. In fact, due to the high gluon density in the initial state, a gluon Bose-Einstein condensate mayform. For an understanding of the properties of such systems the strong interaction effects are essential. Taking them intoaccount within a QCD quasiparticle model, I will discuss the phenomenological implications with regard to theNICA-project.

Primary authors : Prof. PESHIER, Andre (University of Cape Town)

Co-authors :

Presenter : Prof. PESHIER, Andre (University of Cape Town)



Submitted by : Prof. PESHIER, Andre



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STRANGENESS IN QUARK MATTER 2... / Abstracts book QGP away from thermal saturation and gluon condens...


Abstract ID : 155

Tracing back the QCD equation of stateContent :

In lattice QCD, the trace anomaly (or interaction measure) w(T)=e-3p, is central for the calculation of thermodynamicproperties of the quark-gluon plasma. I first point out that, and how, computational uncertainties of w(T) in theconfinement transition region, which do have physical reasons, translate into uncertainties of, say, the pressure (being aweighted integral over w(T)) at larger temperatures, where one would like to have accurate results in order to match toperturbation theory. I will then introduce a novel idea to infer the pressure and the equation of state more accurately evenfrom fairly small lattices and/or computationally less expensive actions.

Primary authors : Prof. PESHIER, Andre (University of Cape Town)

Co-authors :

Presenter : Prof. PESHIER, Andre (University of Cape Town)



Submitted by : Prof. PESHIER, Andre



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Tracing back the QCD equation of state


Abstract ID : 156

Transport study on heavy quarkoniumproduction in heavy ion collisions

Content :

We investigate with a transport approach the cold and hot nuclear matter effects on the charmonium transversemomentum distributions in relativistic heavy ion collisions. The newly defined nuclear modification factorrAA=⟨p2T⟩AA/⟨p2T⟩pp and elliptic flow v2 for J/ψ are sensitive to the nature of the hot medium and the thermalizationof heavy quarks. From SPS through RHIC to LHC colliding energies, we observe dramatic changes in the centralitydependence of rAA. We find that at LHC energy, the finally observed charmonia are dominated by the regeneration fromthermalized heavy quarks.

Primary authors : Dr. ZHOU, Kai (ITP,Goethe University Frankfurt am Main)

Co-authors : Prof. ZHUANG, Pengfei (Tsinghua University)

Presenter : Dr. ZHOU, Kai (ITP,Goethe University Frankfurt am Main)



Submitted by : Dr. ZHOU, Kai



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Transport study on heavy quarkonium production in ...


Abstract ID : 157

The relevance of the ATLASexperience and its relevance to the

data acquisition of the BM@Nexperiment at the NICA complex

Content :

The quest to understand the world around us has increased the size of high energy physics experiments and the processingrate of the data output from high energy experiments. The Large Hadron Collider is the largest experimental set-upknown, with ATLAS detector as one of the detectors built to record proton-proton collision at about 10 Pb/s (Petabits/s)around the LHC interaction point. With the Phase-II upgrade in 2022 this data output will increase by at least 10 timeshigher than those of today due to luminosity increase, this poses a serious challenge on processing and storage of the data.Also the BM@N fixed target experiment is expected to have event size of about 80,000 bytes/Event, leading to hugeamount of data output to be processed in real time. Overtime experimentalists handle these challenges with developmentof High-throughput electronic, with the capability of processing and reducing these data to scientific data in real time. Oneof these high-throughput electronics is the low energy consumption and cost effective general purpose ARM-basedprocessing unit (PU) developed for ATLAS TileCal detector by the University of the Witwatersrand. This work takes alook at the architecture of the data acquisition (DAQ) system of the BM@N detectors and the adaptation of thehigh-throughput PU to last stage of the BM@N DAQ system.

Primary authors : Mr. TOMIWA, Kehinde (University of the Witwatersrand)

Co-authors : ILJA, Slepnev (Joint Institute of Nuclear Research) ; SERGEY, Bazylev (JointInstitute of Nuclear Research)

Presenter : Mr. TOMIWA, Kehinde (University of the Witwatersrand)



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STRANGENESS IN QUARK MATTER 2... / Abstracts book The relevance of the ATLAS experience and its rele...


Abstract ID : 158

Dedicated Vertex Detector For OpenCharm in NA61/SHINE at CERN SPS

Content :

Dedicated Vertex Detector For Open Charm in NA61/SHINE at CERN SPS

Grigory Feofilov (St.Petersburg State University,RF),(for NA61 Collaboration),

Abstract

In this report we present a brief physics motivation and the updated designfor a new Vertex Detector (VD) for the open charm measurements in NA61/SHINEat CERN ? SPS. This new experimental information could shed some light onthe initial stages of nucleus-nucleus collisions at relativistic energies.The 1st studies [1-3] of feasibility of direct open charm measurements in central Pb-Pbcollisions at SPS energies has established the requirements to the design of a new VDfor the NA61 installation [4]. The accuracy of particle tracking to the vertex onthe level of few microns, extremely low material budget (of the order of 0.3 % Xo),a high radiation tolerance and rather high speed will be provided in NA61by the application of coordinate sensitive Si-sensor chips, manufacturedin CMOS process, and by the proven technologies of extremely lightweight thermo-and mecanically stable detector cooling and support structures [5].

Acknowledgements: The presenter is partially supported by the Saint-Petersburg State University grant #11.38.242.2015

References[1] Yasir Ali and Pawel Staszel for the NA61/SHINE collaboration, in Proceedings of 14thInternational Conference on Strangeness in Quark Matter (SQM2013), Journal of Physics:Conference Series 509 012083(2014).[2] Yasir Ali, Pawel Staszel, EPJ Web of Conferences, 71, 00004 (2014).[3] Yasir Ali, Pawel Staszel, Acta Physica Polonica B Proceedings Supplement 6, No 4,1081(2013).[4] N.Abragall et al. (NA61 Collaboration), JINST 9 P06005(2014).[5] The ALICE Collaboration, Technical Design Report for the Upgrade of the ALICE InnerTracking System ALICE-TDR-017, CERN- LHCC-2013-024, 08.11.2013,(2013).

Primary authors : Dr. FEOFILOV, Grigory (Saint-Petersburg State University)

Co-authors :

Presenter : Dr. FEOFILOV, Grigory (Saint-Petersburg State University)



Submitted by : Dr. FEOFILOV, Grigory


STRANGENESS IN QUARK MATTER 2... / Abstracts book Dedicated Vertex Detector For Open Charm in NA61/S...



Comments :This report is presented on behalf of the NA61(SHINE) Collaboration

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Dedicated Vertex Detector For Open Charm in NA61/S...


Abstract ID : 159

Quantum transport in the framework ofdeformation quantization

Content :

We discuss applications of the deformation quantization to the description of the evolution of complex quantum systems.A special role is assigned to phase-space trajectories $ u^{i} (\xi ,\tau ) \in \mathbb{R}^{2n}$ such that $ u^{i} (\xi ,0) = \xi^{i}$, which appear as the Weyl symbols of the operators of the canonical coordinates and momenta in the Heisenbergpicture. The transformation of the phase-space coordinates $\xi^{i} \to u^{i} (\xi ,\tau )$ preserves the Moyal bracket. Thequantum Hamilton equations for $u^{i} (\xi ,\tau )$ are infinite-order partial differential equations (PDEs).

Deformation quantization preserves many features of classical Hamiltonian mechanics. The classical Hamilton equationsare the characteristics equations of the Liouville equation for phase-space particle distributions. Accordingly, the solutionsof the Hamilton equations contain all of the dynamic information needed to determine the time dependence of all of theobservables, including the distribution function. The same situation occurs in quantum physics. Solutions to the quantumHamilton equations define quantum trajectories, which possess all of the properties of characteristics. As a rule,characteristics satisfy a system of first-order ordinary differential equations (ODEs), e.g., the system of Hamilton'sequations. Characteristics are used further to construct solutions of first-order PDEs, such as the Liouville equation. Thepeculiarity of quantum mechanics is that quantum trajectories obey infinite-order PDEs, and they also solve evolutionequations that are infinite-order PDEs.

In the Heisenberg representation, the evolution of the Weyl symbol of operator can be written as\[f (\xi ,\tau ) = f({ \star u}(\xi ,\tau ),0).\]The relationships of fundamental interest, such as the one shown above, are formulated in terms of $\star$-functions thatform a special class of functionals. We outline methods for calculating $\star$-functions using the expansion in powers ofthe Planck's constant.

We demonstrate that, for any fixed order of the semiclassical expansion, the quantum characteristics, $u^{i} (\xi ,\tau )$,can be constructed by solving a finite system of first-order ODEs. This circumstance makes it possible to approach theproblem of evolution of complex quantum systems using numerically efficient ODE integrators. The evolution problemthereby reduces to a statistical-mechanics problem of constructing an ensemble of the quantum characteristics.

The main advantage of the deformation quantization is its proximity to the classical picture of evolution in phase space.Specific quantum effects, such as coherence and non-localities, appear due to increase in the number of dynamic degreesof freedom upon the semiclassical expansion of $u^{i} (\xi ,\tau )$ around the classical trajectories. Those additionaldegrees of freedom are called Jacobi fields.

A classical description of particles propagation is currently an essential feature in modeling quantum transport. With asharp increase in computing power, over the past few decades, now, it is possible to go beyond the classical approximationby including the Jacobi fields in the framework of transport models.

[1] M. I. Krivoruchenko, A. Faessler, J. Math. Phys. \textbf{48}, 052107 (2007).

[2] M. I. Krivoruchenko, C. Fuchs, A. Faessler, Annalen der Physik, \textbf{16}, 587 (2007).

[3] M. I. Krivoruchenko, B. V. Martemyanov, C. Fuchs, Phys. Rev. C \textbf{76}, 059801 (2007).

[4] M. I. Krivoruchenko, Semiclassical methods of deformation quantisation in transport theory, in: \textit{SomeApplications of Quantum Mechanics}, Ed. M. R. Pahlavani (InTech, Zagreb, 2012), pp. 67 - 90, doi: 10.5772/2540.

STRANGENESS IN QUARK MATTER 2... / Abstracts book Quantum transport in the framework of deformation ...


Primary authors : Dr. KRIVORUCHENKO, Mikhail (Institute for Theoretical and ExperimentalPhysics; B. Cheremushkinskaya 25 117218 Moscow, Russia)

Co-authors :

Presenter : Dr. KRIVORUCHENKO, Mikhail (Institute for Theoretical and Experimental Physics; B. Cheremushkinskaya 25 117218 Moscow, Russia)



Submitted by : Dr. KRIVORUCHENKO, Mikhail



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PDF of abstact: krivoruchenko_sqm.pdfLaTeX of abstract: krivoruchenko_sqm.texstyle files:thmsupp.texspie.stysw20spie.sty

please indicate my affiliations:

Institute for Theoretical and Experimental Physics, B. Cheremushkinskaya 25117218 Moscow, Russia,

Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia, and

Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research141980 Dubna, Russia

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Quantum transport in the framework of deformation ...


Abstract ID : 160

Towards a general purposeARM-based processing unit for highdata throughput signal processing in

high energy physicsContent :

Modern projects such as the Large Hadron Collider at CERN generate enormous amounts of raw data which presents aserious computing challenge. After planned upgrades in 2022, the data output from the ATLAS Hadronic Tile Calorimeter(TileCal) will increase by 200 times to over 40 Tb/s. This increase requires more advanced processing on the raw data inorder to harness a larger quantity of good quality physics data. An algorithm called optimal filtering is currently used inthe TileCal front-end for online energy reconstruction of the digitised photo-multiplier tube signals and is currentlyimplemented on Digital Signal Processors (DSPs) and Field Programmable Gate Arrays (FPGAs) which are difficult toprogram and expensive. It is proposed that a cost-effective, high data throughput and general purpose Processing Unit(PU) can be developed by using several commodity ARM processors combined with GPUs and interlinked using apartitioned global address space (PGAS) via PCI-Express while maintaining minimal software design difficulty for theend-user. This PU could be used for a variety of high-level algorithms other than optimal filtering on high data throughputdata such as online data quality testing, data acquisition and full event reconstruction for the NICA BM@N, for example.Optimal filtering and histogram algorithms have been implemented in C++ and several ARM platforms have been testedand shown to have good CPU to external I/O balance.

Primary authors : Mr. COX, Mitchell (University of the Witwatersrand, Johannesburg)

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Presenter : Mr. COX, Mitchell (University of the Witwatersrand, Johannesburg)



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Abstract ID : 161

Strange meson-baryon interaction in ahot and dense medium: recent

progress for a road to GSI/FAIRContent :

We present a study of medium effects on the most relevant binary reactions involving strange pseudoscalar mesons closeto threshold in heavy-ion collisions at FAIR energies. Our results rely on a self-consistent chiral unitary approach incoupled channels which incorporates the $s$- and $p$-waves of the kaon-nucleon interaction, recently extended toaccount for finite temperature and baryonic density effects. Our model provides transition rates and cross sections forreactions such as $KN\to\pi\Sigma$, fully off-shell kaon and anti-kaon spectral functions as well as nuclear opticalpotentials for several hyperon excitations, which are essential ingredients to account for within transport simulations ofstrange hadron dynamics in heavy-ion collisions. Additionally, we explore ``unconventional'' mechanisms for strangenessgeneration within meson-meson and meson-baryon interactions in connection with recent puzzling observations in theproduction of strange hadrons such as $\phi$s and $\Xi$s. Finally, we discuss theoretical developments in the properties ofstrange vector mesons in hot and dense matter.

Primary authors : Dr. CABRERA, Daniel (Frankfurt Institute for Advanced Studies andGoethe-Universität Frankfurt)

Co-authors : Dr. TOLOS, Laura (ICE, Barcelona) ; Prof. AICHELIN, Jörg (SUBATECH, Universitéde Nantes) ; Prof. BRATKOVSKAYA, Elena (Goethe-Universität Frankfurt and FIAS)

Presenter : Dr. CABRERA, Daniel (Frankfurt Institute for Advanced Studies and Goethe-Universität Frankfurt)



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Strange meson-baryon interaction in a hot and dens...


Abstract ID : 162

Multiplicity Distributions in Heavy IonCollisions

Content :

The charged-particle multiplicity is one of the simplest observables in collisions of hadrons, yet it imposes importantconstraints on the mechanisms of particle production. The multiplicity distribution contains information about particlecorrelations. By definition, all information about correlations is removed when the data are reduced to the averagecharged particle multiplicity .

The multiplicity distribution follows a Poisson distribution if the final-state particles are produced independently. In thiscase the dispersion D = sqrt( − 2) is related to the average multiplicity as D=sqrt(n). Deviations from a Poisson distributionindicates correlations.

Earlier, it has been observed that multiplicity distributions follow a universal scaling at high energies (KNO scaling),which was based on Feynman scaling, i,e, based on the assumption that the rapidity density dNch/dy at y=0 reaches alimiting value above a certain energy which corresponds to an asymptotic scaling of the total multiplicity as ∝ln√s . Withz = n/⟨n⟩ the function Ψ(z) = ⟨n⟩P(n) was expected to asymptotically reach a universal energy-independent form. Bubblechamber data was explained by KNO-scaling.

Breaking of KNO-scaling was observed by UA5 collaboration in p +p collisions at √s=200GeV. UA5 found thatmultiplicity distributions up to√s = 540 GeV can be well described by a negative binomial distribution (NBD) which is defined by two parameters ⟨n⟩and k. The parameter k determines the width. It was found that 1/k increases approximately linearly with ln√s whereasKNO scaling corresponds to a constant, energy-independent 1/k.

Above √s=900GeV, a shoulder-like structure appeared at n ≈ 2⟨n⟩ which could not be described with a single NBD. Thisled to a two-component model which described the measured data by a combination of two NBDs, interpreting one as asoft and one as a semi-hard component. Thus, the multiplicity distributions were described by double NBD.

For heavy-ions, multiplicity distributions have been described by the PHENIX experiment (for Au+Au upto √s=200GeV)by Negative Binomial Distributions.

In my work, I have observed how we can explain the multiplicity distributions at LHC energies for heavy-ion collisions. Ithas been also investigated whether any scaling is followed in describing the distributions at such high energies forheavy-ion collisions. For this, a detailed study has been done from √s=7.7 GeV/A to √s= 5.5TeV/A with event generatorsHIJING, AMPT-Default and AMPT-String Melting and it has been investigated how we can explain the distributionswithin such a large energy-range for heavy-ion collisions and how the parameters extracted from the multiplicitydistributions change from lower to higher energies.The results will be shown and discussed in details.

Summary :

I work as an experimentalist in ALICE. My talk will be mostly answer to the open question about the nature of the particlenumber distributions in LHC-energy for heavy-ion collisions. As particle number is the most basic observable one canmeasure experimentally and several other observables depend on it, to study the multiplicity distributions over a largeranges of energy is of immense importance.

Also it will be discussed how the multiplicity distribution parameters are connected to early stages of collisions, i.e, theinitial states.

STRANGENESS IN QUARK MATTER 2... / Abstracts book Multiplicity Distributions in Heavy Ion Collisions


Primary authors : Mrs. MUKHERJEE, Maitreyee (Homi Bhaba Research Institution (HBNI))

Co-authors :

Presenter : Mrs. MUKHERJEE, Maitreyee (Homi Bhaba Research Institution (HBNI))



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Multiplicity Distributions in Heavy Ion Collisions


Abstract ID : 163

Multiplicity Fluctuations in Heavy IonCollisions

Content :

Fluctuations of various observables in heavy-ion collisions at ultra-relativistic energies have been extensively studied inliterature as they provide important signals regarding the formation of the Quark Gluon Plasma. ‘Multiplicity’ denotes thenumber of produced particles after the collision. Multiplicity distribution and their fluctuations shed light into mechanismof particle production and provide constraints to many models aiming at describing these collisions. Multiplicityfluctuations are related to fundamental properties of the system such as isothermal compressibility, quark numbersusceptibility, etc. So, a detailed study of event-by-event multiplicity fluctuations, which has been possible due to largenumber of particle production in each event at ultra-relativistic energies, has been proposed as one of the basic signaturesof a phase transition.

Moreover, multiplicity fluctuation is the basic fluctuation which affects fluctuations in many other important observablessuch as energy density, temperature, etc. By studying the charged particle multiplicity fluctuations in heavy-ion collisionsas a function of varying number of participating nucleons or centrality it may be possible to obtain information on thenature of the QGP matter.

The observed fluctuations will have contributions from statistical fluctuations and those which have dynamical origin. Thecontribution from dynamical origin comprises of fluctuations, which do not change event-by-event, e.g., those fromBose-Einstein (BE) correlations, resonance decays and the fluctuations, which have new physics origin and may vary fromevent-to-event. We are interested mainly in extracting the dynamical fluctuation, minimizing the statistical fluctuation asmuch as possible.

Multiplicity fluctuation is a very important study especially in higher energies as at higher energies (especiallyLHC-energies) Bjorken-x is very low (~10-4)so we can have a connection to initial state collisions too.

Recently, the source of the multiplicity fluctuation has been extensively studied theoretically in the microscopic level.Within framework of the relativistic fluctuating hydrodynamics, entropy and in turn, event-by-event multiplicityfluctuation has been studied as the outcome of noises during hydrodynamic evolution of the quark-gluon fluid created inhigh-energy nuclear collisions, even if the initial state is the same in a macroscopic sense.

In my work, I have observed the centrality-dependence and beam-energy dependence (from RHIC to LHC energies,i.e,from 7.7 GeV/A to 5.5TeV/A) of multiplicity fluctuation (measured by obtaining scaled variance, defined by variancescaled over mean, from the multiplicity distributions) using event generators HIJING, AMPT-Default and AMPT-StringMelting to observe the trend and its change with respect to energy as well as centrality. I have used a different set ofcentrality selection by taking 1% ,2% and 5% cross section bins, such as 0-1%, 1-2%, 2-3% and, 0-2%, 2-4%, 4-6%, 6-8% and,0-5%, 5-10%, 10-15% etc. Results for 2% and 5% centrality bins have been binwidth corrected to get rid of the impactparameter variations arising due to finite centrality bins. The parameters from multiplicity distributions are obtained byfitting the distributions and these parameters are connected to multiplicity fluctuation.

Primary authors : Mr. BASU, Sumit (Variable Energy Cyclotron Centre)

Co-authors :

Presenter : Mr. BASU, Sumit (Variable Energy Cyclotron Centre)


STRANGENESS IN QUARK MATTER 2... / Abstracts book Multiplicity Fluctuations in Heavy Ion Collisions



Submitted by : Mrs. MUKHERJEE, Maitreyee


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STRANGENESS IN QUARK MATTER 2... / Abstracts book Multiplicity Fluctuations in Heavy Ion Collisions


Abstract ID : 164

Beam Energy Scan of Specific Heatthrough Temperature Fluctuations

Content :

Experiments at RHIC and LHC are on the quest to unearth the nature of the QCD phase transition and to get a glimpse of how matter behaves at such extreme conditions. Phase transitions are governed by a set of thermodynamic parameters, like, temperature, pressure, entropy, and energy density, and can be further characterized by their response functions, such as, specific heat, compressibility, and susceptibility. Around the transition point specific heat goes through sudden changes [1], which can be used as a signal for the phase transition, and to probe the QCD critical point. Large event-by-event fluctuations in energy density, multiplicity, temperature ($T$), mean transverse momentum ($\langle p_{\rm{T}} \rangle$~), strangeness and other thermodynamic quantities are expected to be associated with the phase transition. In addition, fluctuations in the higher moments of conserved quantities, such as net-charge, net-baryon number and net-strangeness, are predicted as probes of the critical point. In thermodynamics, the heat capacity is defined in terms of the ratio of the event-by-event fluctuations of the energy ($E$) of a part of a finite system in thermal equilibrium to the energy [1, 2, 3, 4]: $ { (\Delta E^2) } = {T^2}C(T) $, Where C is the heat capacity of the system.This can be applied for a locally thermalized system produced during the evolution of heavy-ion collisions. But, for a system at freeze-out, $C$ can expressed in terms of the event-by-event fluctuations in temperature of the system where volume are fixed: \begin{eqnarray} \frac{1}{C} = \frac{(\langle T^2 \rangle - \langle T \rangle ^2 )} { \langle T \rangle ^2}. \end{eqnarray} We define the specific heat ($c_v$) as the heat capacity per pion multiplicity within the available phase space or the experimentally available window in rapidity and azimuth. For a system in equilibrium, the mean values of $T$ and $E$ are related by an equation of state. However, the fluctuations in energy and temperature have quite different behaviour. Energy being an extensive quantity, its fluctuations will have a component arising from the volume fluctuations, and not directly suited for obtaining the heat capacity [2]. In the absence of direct measurement of temperature fluctuations, several attempts have been made to obtain the specific heat from event-by-event fluctuations in mean transverse momentum [5,6,7]. This method has some caveats as the fluctuations in $\langle p_{\rm{T}} \rangle$~ are not the same as temperature fluctuations. In this presentation, we attempt to obtain heat capacity and subsequently specific heat from the temperature and its fluctuations for a beam energy scan. Different experimental results for both the fixed-target and collider like NA-49, STAR, PHOBOS and ALICE are compared. Also an event generator AMPT model study with above energy are given for a feasibility study. Reference: 1. L.D. Landau.and E.M. Lifshitz, STATISTICAL PHYSICS, (Course of Theoretical Physics, v. 5, 3rd, rev. and enlarged ed.) Pergamon Press (1980). 2. L. Stodolsky, Phys. Rev. Lett. {\bf 75}, 1044 (1995). 3. E.V. Shuryak, Phys. Lett. B {\bf 423}, 9 (1998). 4. M.A. Stephanov, K. Rajagopal and E. V. Shuryak, Phys. Rev. Lett. {\bf 81}, 4816 (1998).

STRANGENESS IN QUARK MATTER 2... / Abstracts book Beam Energy Scan of Specific Heat through Temperat...


5. T. Alber {\it et al.} (NA49 Collaboration), Phys. Rev. Lett. {\bf 75} 3814 (1995). 6. R. Korus {\it et al.}, Phys. Rev. {\bf C 64}, 054908 (2001). 7. Ben-Hao Sa {\it et al.} Phys. Rev. {\bf C 75}, 054912 (2007).

Primary authors : Mr. BASU, Sumit (Variable Energy Cyclotron Centre)

Co-authors : Prof. NAYAK, Tapan (Variable Energy Cyclotron Centre)

Presenter : Mr. BASU, Sumit (Variable Energy Cyclotron Centre)



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Beam Energy Scan of Specific Heat through Temperat...


Abstract ID : 165

Jet-induced modifications of thecharacteristic of the bulk nuclear matterContent :

Jets are widely used as probes of properties of the Quark-Gluon Plasma. The mechanism of the energy loss due tointeractions with the nuclear matter was a topic of extensive theoretical and experimental studies in the last two decades.However, the energy dissipated by jets can also alter properties of bulk nuclear matter (for instance elliptic flow) in theintermediate transverse momentum range and there is little understanding of such effects.

In this poster, we present our studies on jet-induced modificationsof the characteristic of the bulk nuclear matter. Todescribe such a matter, we use efficient relativistic hydrodynamic simulations i (3+1)-dimension employing the GraphicsProcessing Unit (GPU) in the parallel programming framework. We use Cartesian coordinates in the calculations to ensurea high spatial resolution that is constant throughout the evolution of the system. We show our results on how jets modifythe hydrodynamics fields and we discuss the implications.

Primary authors : Dr. SLODKOWSKI, Marcin (Warsaw University of Technology)

Co-authors : Dr. KIKOLA, Daniel (Warsaw University of Technology) ; Mr. MARCINKOWSKI,Patryk (Warsaw University of Technology) ; Dr. PORTER-SOBIERAJ, Joanna (WarsawUniversity of Technology) ; Mr. SIKORSKI, Jan (Uniwersity of Warsaw)

Presenter : Mr. MARCINKOWSKI, Patryk (Warsaw University of Technology)



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Jet-induced modifications of the characteristic of...


Abstract ID : 167

Thermalization of hadrons throughHagedorn states

Content :

One of the most intriguing questions in high energy collisions is howhadrons produced in a non-equilibrium system achieve thermalequilibrations on such short time scales. To simulate the dynamicmultiplicity evolution of hadron multiplicities we use the hadronictransport model "UrQMD" as microscopic model for high-energetic heavyion collisions. Currently the equilibration times in this model are toolong because detailed balance is not realized for all collisions whichmay occur. In our approach to get rid of this drawback we deployHagedorn-States proposed by the "Statistical Bootstrap Model". Creationof these states in binary collisions and their decay into two particlesonly will lower the thermalization times in UrQMD.

Primary authors : Dr. GALLMEISTER, Kai (Institut für Theoretische Physik, Goethe-UniversityFrankfurt)

Co-authors : Mr. BEITEL, Max (Institut für Theoretische Physik, Goethe-University Frankfurt) ;Prof. GREINER, Carsten (Institut für Theoretische Physik, Goethe University Frankfurt)

Presenter : Dr. GALLMEISTER, Kai (Institut für Theoretische Physik, Goethe-University Frankfurt)



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STRANGENESS IN QUARK MATTER 2... / Abstracts book Thermalization of hadrons through Hagedorn states


Abstract ID : 168

CMS results on heavy flavours andquarkonia

Content :

The CMS collaboration has recorded 150 μb-1 and 35 nb-1 of PbPb and pPb collisions, at 2.76TeV and 5.02TeV,respectively. This presentation reports the results of the heavy quark measurements including quarkonia and open Bmeasons. A particular emphasis is given to the most recent results regarding the suppression of J/psi, psi(2S) and upsilonsin Pb+Pb collisions, and the study of cold nuclear matter effect based on p+Pb collision.

Primary authors : KIM, Yongsun (Korea University)

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Presenter : KIM, Yongsun (Korea University)



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STRANGENESS IN QUARK MATTER 2... / Abstracts book CMS results on heavy flavours and quarkonia


Abstract ID : 169

Hydrodynamic helicity amd strangehyperons polarization in Heavy-Ion

CollisionsContent :

We study the structure of vorticity and hydrodynamic helicity fields in peripheralheavy-ion collisions using the kinetic Quark-Gluon Strings Model.The angular momentum which is the source of P-odd observables is preservedwith the good accuracy.We observe the formation of specific toroidal structures of vorticity field.Their existence is mirrored in the polarization of hyperons of the percentorder. The results are compatiple with that in the approach based on thermal vorticity.

Primary authors : TERYAEV, Oleg (JINR) ; Dr. BAZNAT, Mircea (JINR) ; Dr. GUDIMA, Konstantin(JINR) ; Prof. SORIN, Alexander (JINR)

Co-authors :

Presenter : TERYAEV, Oleg (JINR)



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Abstract ID : 174

Charm in nuclear matterContent :

To shed some light on matter under extreme conditions, as in the early stages of the universe or in neutron stars or inmatter created transiently in relativistic heavy-ion collisions, it is instructive to study heavy quarks as antennas signalingchanges of the strongly interacting environment composed of light hadrons. In particular, open charm mesons can serve asimportant probes of hot and dense nuclear matter. Medium modi-fications of their spectral properties are evaluated bymeans of QCD sum rules utilizing condensates which refer to symmetries of the QCD Lagrangian. Most prominently, thechiral condensates contributes to order parameters of chiral symmetry. Its vanishing at non-zero temperatures and/orbaryon densities may signal chiral restoration. Latest re-sults of pseudo-scalar in-medium D meson masses are presented and chiral symmetry aspects of open charm mesons arediscussed within the scope of Weinberg-type sum ru-les. With respect to the planned experiments at FAIR in Darmstadt studying D mesons in strongly-interacting matter,profound theoretical analyses are mandatory for such large-scale experiments.

Supported by BMBF.

Primary authors : BUCHHEIM, Thomas (Helmholtz-Zentrum Dresden-Rossendorf, TechnischeUniversität Dresden)

Co-authors :

Presenter : BUCHHEIM, Thomas (Helmholtz-Zentrum Dresden-Rossendorf, Technische Universität Dresden)



Submitted by : KOROTKOVA, Anna

Submitted on Tuesday 05 May 2015


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STRANGENESS IN QUARK MATTER 2... / Abstracts book Charm in nuclear matter


Abstract ID : 175

Transport coefficients andquark-hadron phase transition from

PLSM in vanishing and finite magneticfield

Content :

Understanding properties of quark-gluon plasma is an ultimate goal of current and future relativistic heavy-ionexperiments. Big efforts are exerted so far to stimulate results with as much precision as possible in order to characterizethe key properties of this very special form of QCD matter in small scale (very high energy). It is obvious that achievingthis ultimate goal requires sophisticated theoretical, experimental, and numerical efforts. We introduce a systematicanalysis of some transport coefficients. In doing this, we make benefit from the exact knowledge we have so far about thefundamental thermodynamic quantities such as the equation of state, specific heat, squared speed of sound and quarknumber multiplicity as a function of temperature and chemical potential in order to determine electric and heatconductivity and bulk and shear viscosity. Doing this, we can estimate the relationship between these quantities and thepossible experimental observations. Furthermore,we analyze the impacts of strange quark on the transport coefficient. We also determine the quark-hadron phase transitionin two and three quark falvors from Polyakov linear-sigma model in vanishing an finite magnetic field. The background(electro)magnetic field is an essential parameter that is thought to have rich physical applications (QCD phase diagram,propertied of s-quark plasma, neutron stars, early universe, etc.) We confront PLSM results with non-perturbative latticesimulations.

Primary authors : TAWFIK, Abdel Nasser (MTI Univ., Faculty of Engineering)

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Presenter : TAWFIK, Abdel Nasser (MTI Univ., Faculty of Engineering)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Transport coefficients and quark-hadron phase tran...


Abstract ID : 176

Heavy mesons in hadronic medium:interaction and transport coefficients

Content :

I will review the recent results of heavy meson diffusion in thermal hadronic matter. The interactions of D and B mesonswith other hadrons (light mesons and baryons) are extracted from effective field theories based on chiral and heavy-quarksymmetries. When these guiding principles are combined with exact unitarity, physical values of the cross sections areobtained. These cross sections (which contain resonant contributions) are used to calculate the drag and heavy diffusioncoefficients of heavy mesons immersed in a thermal and dense medium. The transport coefficients are computed using aFokker-Planck reduction of the Boltzmann equation.

Primary authors : TORRES-RINCON, Juan M. (Subatech)

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Presenter : TORRES-RINCON, Juan M. (Subatech)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Heavy mesons in hadronic medium: interaction and t...


Abstract ID : 178

Baryon stopping signal for mixed phaseformation in HIC

Content :

The impact of the experimental acceptance, i.e. transverse-momentum ($p_T$) cut-off and limited rapidity region, on theearlier predicted irregularity in the excitation function of the baryon stopping is studied. This irregularity is a consequenceof the onset of deconfinement occurring in the compression stage of a nuclear collision and manifests itself as a wiggle inthe excitation function of the reduced curvature ($C_y$) of the net-proton rapidity distribution at midrapidity.It is demonstrated that the wiggle is a very robust signal of a first-order phase transition that survives even underconditions of a very limited acceptance.At the same time the $C_y$ for pure hadronic and crossover transition scenarios become hardly distinguishable, if theacceptance cuts off too much of the low-$p_T$ proton spectrum and/or puts too narrow rapidity window aroundmidrapidity. It is found that the shape of the net-proton rapidity distribution near midrapidity depends on the $p_T$cut-off. This implies that the measurements should be taken at the same acceptance for all collision energies in order toreliably conclude on the presence or absence of the irregularity.

Primary authors : IVANOV, Yu. (ational Research Centre "Kurchatov Institute", 123182 Moscow,Russia, and National Research Nuclear University "MEPhI" 115409 Moscow,Russia) ; BLASCHKE, D. (Institute of Theoretical Physics, University of Wroclaw,50-204 Wroclaw, Poland, and Bogoliubov Laboratory of Theoretical Physics,JINR Dubna, 141980 Dubna, Russia)

Co-authors :

Presenter : IVANOV, Yu. (ational Research Centre "Kurchatov Institute", 123182 Moscow, Russia, and National Research Nuclear University "MEPhI" 115409 Moscow, Russia)




Submitted on Wednesday 06 May 2015

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Baryon stopping signal for mixed phase formation i...


Abstract ID : 180

Production of Vector Mesons inUltra-Peripheral Pb-Pb Interactions with

ALICEContent :

Very intense electromagnetic fields are generated in the vicinity of ultrarelativistic heavy ions. In ultraperipheralinteractions, where the distance between the nucleiis slightly more than the sum of their radii, these fields provide the dominant source of interaction between the nuclei. AtLHC energies this can lead to exclusive particle production. The ALICE collaboration has measured the exclusiveproduction of rho, J/psi and Psi' mesons in Pb-Pb interactions at 2.76 TeV. In this presentation, the latest results, togetherwith the plans for Run 2, will be discussed.

Primary authors : VILLALOBOS-BAILLIE, Orlando (UK)

Co-authors :

Presenter : VILLALOBOS-BAILLIE, Orlando (UK)




Submitted on Thursday 07 May 2015

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Production of Vector Mesons in Ultra-Peripheral Pb...


Abstract ID : 188

Prospects of elliptic flow studies atNICA/MPD

Content :

As a key observable anisotropic flow presents a unique insight into heavy ion collision physics. The presented posterreveals the prospects of studying elliptic flow at the NICA/MPD facility through the UrQMD model. Presented are resultson elliptic flow for simulated and reconstructed hadrons at the planned NICA energy range.

Primary authors : GERAKSIEV, Nikolay (JINR)

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Presenter :






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Prospects of elliptic flow studies at NICA/MPD


Abstract ID : 189

Hard parton production in thequark-gluon plasma

Content :

Abstract: AdS/CFT computations have been used to describe the energy loss of QCD-like particles moving through astrongly coupled plasma, but little is understood regarding the initial conditions of these jets. We use theSchwinger-Keldysh finite-time formalism applied to an interacting scalar field theory to derive a perturbative expressionfor the energy momentum tensor associated with hard particle production.Further, we define the QFT conditional expectation value in an effort to detail the weakly coupled system during theinitial stages of heavy ion collisions. This is used as a foundational model to study jet production in the QGP.

Primary authors : Mr. MEIRING, Ben (University of Cape Town)

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Presenter : Mr. MEIRING, Ben (University of Cape Town)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Hard parton production in the quark-gluon plasma


Abstract ID : 190

Heavy flavor in heavy-ion collisionsContent :

We study charm production in ultra-relativistic heavy-ion collisions by using the Parton-Hadron-String Dynamics (PHSD)transport approach. The initial charm quarks are produced by the Pythia event generator tuned to fit the transversemomentumspectrum and rapidity distribution of charm quarks from Fixed-Order Next-to-Leading Logarithm (FONLL) calculations.The produced charm quarks scatter in the quark-gluon plasma (QGP) with the off-shell partons whose masses and widthsare given by the Dynamical Quasi-Particle Model (DQPM), which reproduces thelattice QCD equation-of-state in thermal equilibrium. The relevant cross sections are calculated in a consistent way byemploying the effective propagators and couplings from the DQPM. Close to the critical energy density of the phasetransition, the charm quarks are hadronized into $D$ mesons through coalescence andfragmentation. The hadronized $D$ mesons then interact with the various hadrons in the hadronic phase with crosssections calculated in an effective lagrangian approach with heavy-quark spin symmetry. The nuclear modification factor$R_{AA}$ and the elliptic flow $v_2$ of $D^0$ mesons from PHSD are compared with the experimental data from theSTAR Collaboration for Au+Au collisions at $\sqrt{s_{NN}}$ =200 GeV and to the ALICE data for Pb+Pb collisions at$\sqrt{s_{NN}}$ =2.76 TeV. We find that in the PHSD the energy loss of $D$ mesons at high $p_T$ can be dominantlyattributed to partonic scattering while the actual shape of $R_{AA}$ versus $p_T$ reflects the heavy-quark hadronizationscenario, i.e. coalescence versus fragmentation. Also the hadronic rescattering is important for the $R_{AA}$ at low $p_T$and enhances the $D$-meson elliptic flow $v_2$.

Primary authors : BRATKOVSKAYA, Elena (Frankfurt)

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Presenter : BRATKOVSKAYA, Elena (Frankfurt)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Heavy flavor in heavy-ion collisions


Abstract ID : 191

The hyperon puzzle in the neutron starEoS

Content :

In this talk I will review some of the effects of hyperons on neutron and proto-neutron star properties. In particular, I willrevise the problem of the strong softening of the EoS, and theconsequent reduction of the maximum mass, due to the presence of hyperons, a puzzle which has become more intriguingand difficult to solve due the recent measurements of the unusually high masses of the millisecond pulsars PSR J1903+0327(1.667+/.0.021Msun), PSR J1614-2230 (1.97+/-0.04Msun) and PSR J0348+0432 (2.01 +/- 0.04 Msun).I will discuss some of the solutions proposed to solve this puzzle. Finally, I will also examine briefly the role of hyperonson the cooling properties of newly born neutron stars and on the so-called r-mode instability.

Primary authors : VIDANA, Isaac (University of Coimbra,PORTUGAL)

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Presenter : VIDANA, Isaac (University of Coimbra,PORTUGAL)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book The hyperon puzzle in the neutron star EoS


Abstract ID : 192

Prospects for the dense baryonicmatter research at NICA

Content :

The project NICA (Nuclotron-based Ion Collider fAcility) is aimed to study hot and dense baryonic matter in heavy ioncollisions in the energy range up tosNN = 11 GeV at the Nuclotron extracted beams and at the NICA collider with average luminosity of L 11027cm2s1 (for 197Au79). This study will be performed with two experiments, BM@N (Baryonic Matter at Nuclotron) andMPD (MultiPurpose Detector) at the NICA collider.

Primary authors : KEKELIDZE, V. (JINR)

Co-authors :

Presenter : KEKELIDZE, V. (JINR)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Prospects for the dense baryonic matter research a...


Abstract ID : 193

Overview of ALICE resultsContent :

In this talk, recent results from the ALICE Collaboration will be presented and discussed. Special emphasis will be given tomeasurements relevant for strangeness and open and hidden heavy flavour physics.

Primary authors : FLORIS, Michele (CERN)

Co-authors :

Presenter : FLORIS, Michele (CERN)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Overview of ALICE results


Abstract ID : 194

A new approach to detect hypernucleiin the QMD/HSD phase space

distribution at relativistic energiesContent :

We developed an improved clusterisation algorithm which aims at predicting more realistically the yields of clusters in theframework of the Quantum Molecular Dynamics model. This new approach is able to predict isotope yields as well ashypernucleus production at relativistic energies. To illustrate its predicting power, we confront this new method toexperimental data, with a close view on light hypernucleus yields and phase space distributions, and show the sensitivityon the parameters which govern the hypercluster formation, such as the hyperon-nucleon cross-section, the clusterisationtime, the initial momentum distribution of nucleons and the asymmetry energy.

Primary authors : LE FÈVRE, A. (GSI Helmholtzzentrum für Schwerionenforschung GmbH,Darmstadt, Germany)

Co-authors : LEIFELS, Y. (GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt,Germany) ; AICHELIN, J. (SUBATECH, UMR 6457, Ecole des Mines de Nantes -IN2P3/CNRS - Université de Nantes, France) ; HARTNACK, Ch. (SUBATECH, UMR 6457,Ecole des Mines de Nantes - IN2P3/CNRS - Université de Nantes, France) ;BRATKOVSKAYA, E. (FIAS, Francfort University, Germany) ; KIREYEV, V. (JINR, Dubna,Russia)

Presenter : LE FÈVRE, A. (GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book A new approach to detect hypernuclei in the QMD/HS...


Abstract ID : 195

Lattice-QCD Studies of the H-DibaryonContent :

I review recent attempts to study the H-Dibaryon using lattice-QCD simulations. After a brief overview of the theoreticalmotivations and experimental status, I describe the main techniques which are applied in current lattice calculations inorder to keep the numerical effort at a manageable level. Furthermore, the role of multi-particleoperators for the correct identification of the ground state energy is elucidated. The results obtained by several groups arecompared and interpreted.

Primary authors : WITTIG, Hartmut (Johannes Gutenberg-Universität Mainz)

Co-authors :

Presenter : WITTIG, Hartmut (Johannes Gutenberg-Universität Mainz)




Submitted on Friday 22 May 2015


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STRANGENESS IN QUARK MATTER 2... / Abstracts book Lattice-QCD Studies of the H-Dibaryon


Abstract ID : 196

Flow of strange and charged particlesin pp, pPb and PbPb collisions

Content :

The observation of a long-range near-side two-particle correlation (known as the "Ridge") in high-multiplicity pp and pPbcollisions opened up new opportunities of exploring novel QCD dynamics in small collision systems. To further explorethe origin of this phenomenon, measurements of pT spectra and two-particle correlations wih identified strange particlesin pp, pPb and PbPb systems would be presented, using CMS detectors at LHC. Results in different systems are presentedand compared over a wide range of multiplicity and rapidity. These results provide key insights to the dynamics in highmultiplicity but small systems.

Primary authors : TU, Zhoudunming (Rice University USA)

Co-authors :

Presenter : TU, Zhoudunming (Rice University USA)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Flow of strange and charged particles in pp, pPb a...


Abstract ID : 197

Correlations and flavors in jets inALICE

Content :

Hard scattering processes probe properties of the strongly interacting matter produced in collisions of heavy ionsaccelerated to ultra-relativistic energies.The medium created in such collisions modifies parton fragmentation whencompared to the vacuum pp case and induces the jet quenching.In the talk we will present the latest experimental results for fully reconstructed jets in central and semi-central Pb–Pbcollisions at 2.76 TeV. Comparison of data to models helps to better constrain the nature of parton energy loss mechanism.In this context we will discuss also results from p–Pb collisions at 5.02 TeV for different event multiplicity classes. Thismeasurement is used to assess cold nuclear matter effects.Yet another view on the jet quenching phenomenon can be obtained by studying correlations between jets and hadronssince such measurements provide different event biases. In the talk we will report the measurement of semi-inclusive pTspectra of charged particle jets that recoil from a high-pT hadron trigger in Pb–Pb and pp collisions at √(s_(NN)) = 2.76TeV and √s = 7 TeV, respectively. Hadron-jet coincidence measurements offer a way to remove the contribution ofuncorrelated jets at the event-ensemble level without introducing a bias on thejet population which is therefore collinear and infrared safe.In addition, possible signs of modified parton fragmentation and its connection to the baryon anomaly can be studied bymeans of measurement of identified particles reconstructed in jets. We will show recent results on the measurements ofthe pT spectra of Λ baryons and K0s mesons produced in association with charged jets in Pb–Pb collisions at √(s_(NN)) =2.76 TeV and in p–Pb collisions at √(s_(NN)) = 5.02 TeV. In this analysis we exploit the excellent particle identificationcapabilities of the ALICE detector.

Primary authors : KRIZEK, F. (Nuclear Physics Institute AS CR)

Co-authors :

Presenter : KRIZEK, F. (Nuclear Physics Institute AS CR)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Correlations and flavors in jets in ALICE


Abstract ID : 198

The ALICE Upgrade programmeContent :

The ALICE experiment at the LHC is dedicated to the study of the strongly-interacting medium with high temepratureand energy density produced in ultra-relativistic heavy-ion collisions. This study is carried out by means of proton-proton,proton-lead and lead-lead collisions at centre-of-mass energies in the TeV regime. In particular, lead-lead collisions haveenergies per nucleon-nucleon collision in the range 2.76 TeV (LHC Run 1) to 5.5 TeV (LHC design energy, Run 3).The ALICE Collaboration will undertake a major upgrade for the detector apparatus during the second LHC longshutdown (LS2, 2018-19) in view of the LHC Runs 3 and 4 (2020 to 2028).The objective of the ALICE upgrade for LS2 is two-fold: i) an improvement of the tracking precision and efficiency, inparticular in the low-momentum range; ii) an improvement of the readout capabilities of the experiment, in order to fullyexploit the LHC luminosity for heavy ions envisaged after LS2.The first goal will be achieved by replacing the Inner Tracking System with a new tracker, composed of seven cylindricallayers of silicon pixel detectors with fast readout and high granularity, and by introducing a new telescope tracker, alsocomposed of pixel detectors, in front of the muon spectrometer. As an example the resolution of the track spatial positionwill improve by about a factor of three in the direction transverse to beam line. The second goal will be achieved byreplacing the readout chambers of the Time Projection Chamber with multigap resistive plate detectors, by upgrading orreplacing the readout electronics of several of the other detector systems, by adding a new fast trigger detector and byimplementing a new integrated online-offline architecture. The upgraded ALICE detector will be capable of reading outPb-Pb interactions in minimum-bias trigger mode at a rate of 50 kHz, corresponding to 100 times the current rate.The prime physics goals of the ALICE upgrade are high-precision measurements of heavy-flavour, charmonium andlow-mass dilepton production, with particular emphasis on the low momentum region. For example, in the sector of openheavy flavour, the new silicon trackers, in conjuction with the high rate capabilites, will allow us to extend to trannsversemomentum zero or close to zero the measurements of nuclear modification factor and elliptic flow of charm and beautymesons and to access the reconstruction of heavy-flavour baryon decays. In the quarkonium sector, the production andelliptic flow of J/psi and psi(2S) states will be measured with unprecedented precision down to zero transverse momentum,with the separation of prompt and B-decay contributions both at central and forward rapidity.A further upgrade project is in preparation within the ALICE Collaboration: the construction of a calorimeter withhigh-granularity readout to be installed in the forward region of the experiment, possibly during LS3 (around 2023). Theprimary goal of this detector is the study of parton saturation through measurements of photon and pion production in thepseudo-rapidity range around 3-5 in proton-proton and proton-nucleus collisions.

Primary authors : DAINESE, Andrea (INFN - Padova, Italy)

Co-authors :

Presenter : DAINESE, Andrea (INFN - Padova, Italy)




Submitted on Saturday 23 May 2015

Last modified on : Saturday 23 May 2015

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STRANGENESS IN QUARK MATTER 2... / Abstracts book The ALICE Upgrade programme



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STRANGENESS IN QUARK MATTER 2... / Abstracts book The ALICE Upgrade programme


Abstract ID : 199

STAR results on strangenessproduction and properties of sQGP

Content :

Macau University of Science and Technology / Tsinghua UniversityStrange hadron production is sensitive to the dynamics of the hot and dense matter created in nucleus-nucleus collisions.In particular, the strange quark production rate and its subsequent evolution in the dense partonic medium depend on thebeam energy and system size. In this talk, we will present the recent STAR measurements on the production of variousstrange hadrons (K0s, phi, Lambda, Xi and Omega) in √SNN = 7.7 - 39 GeV Au+Au collisions in the STAR beam energyscan program as well as in p+p, Au+Au and U+U collisions at 200 GeV. We investigate the strangeness enhancement andstrangeness equilibration as a function of beam energy and system size at RHIC. Nuclear modification factors and particleratios will also be highlighted. Implications on partonic vs. hadronic dynamics as a function of the beam energy andsystem size will be discussed.

Primary authors : ZHANG, Xiaoping (STAR Collaboration)

Co-authors :

Presenter : ZHANG, Xiaoping (STAR Collaboration)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book STAR results on strangeness production and propert...


Abstract ID : 200

Hadron production at SIS energies: anupdate from HADES

Content :

Data on particle production in heavy ion collisions in the energy regime of 1-2 A GeV have been collected over almostthree decades now. As most of the newly created hadrons areproduced below or slightly above their free NN-thresholds, data are usually interpreted with the help of phenomenologicalmodels, rather than comparing to elementary reference mea-surements. Driven by advance in detector technology, more and more rare and penetrating probes have become accessible,and still keep challenging our knowledge about the propertiesof the created system and its dynamical evolution. In this contribution we give an overview of the recent findings onstrangeness production from HADES, with a special emphasis on the data from Au+Au collisions at 1.23 A GeV. Amongother things, we discuss the rise of the φ/K − ratio towards lower energies and its implication for the interpretation of thespectral shape of the negative kaons. This work has been supported by a Feodor-Lynen Fellowship of the Alexander vonHumboldt-Stiftung, BMBF (05P12RFGHJ), Helmholtz Alliance EMMI, HIC for FAIR, HGS-HIRe.

Primary authors : LORENZ, Manuel (Utrecht University, The Netherlands)

Co-authors :

Presenter : LORENZ, Manuel (Utrecht University, The Netherlands)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Hadron production at SIS energies: an update from ...


Abstract ID : 201

Theory status of quarkoniumproduction in proton-nucleus collisions

Content :

I will start with a brief overview of the present understanding of quarkonium production in proton-proton collisions in thekinematical regions relevant for heavy-ion physics, namely at low and mid transverse momenta. I will then present someof the theoretical expectations based on different mechanisms, prior to the LHC p-Pb run, which were based on theinterpretation of data mostly from RHIC and fixed-target experiments at the SPS and Fermilab. I will then move on to theimpact of the LHC data taken at 5 TeV in p-Pb collisions. I will conclude with a discussion of what the requirements forfuture measurements at the LHC and RHIC are in order to advance our understanding of this physics and of what afixed-target experiment using the LHC beams could also bring to the community.

Primary authors : LANSBERG, Jean-philippe (IPNO - Paris-Sud U. - CNRS/IN2P3, Orsay,FRANCE)

Co-authors :

Presenter : LANSBERG, Jean-philippe (IPNO - Paris-Sud U. - CNRS/IN2P3, Orsay, FRANCE)




Submitted on Sunday 24 May 2015

Last modified on : Sunday 24 May 2015

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Theory status of quarkonium production in proton-n...


Abstract ID : 202

In-medium heavy quarkonium fromlattice QCD spectral functions

Content :

The experimental efforts at relativistic heavy-ion co lliders such as RHIC and LHC have propelled the study of in-mediumheavy quarkonium physics into a precision era. This abundance of high quality data urges theory to develop a quantitativeunderstanding of heavy-quark bound state properties at finite temperature, as well as their dynamical behavior from firstprinciples, which ultimately will allow us to extract the properties of the quark-gluon-plasma created in the collisioncenter.

On the one hand, to obtain insight into the physics in the presence of a non-perturbative QCD medium, lattice QCDsimulations are an indispensable tool. On the other hand, phenomenologically relevant dynamical information is notdirectly accessible in the Euclidean formulation used therein. Recent progress in the extraction of spectral functions [1]using Bayesian inference has however made it possible to access such real-time information in a quantitatively robustmanner.

We report on subsequent progress made in determining the in-medium potential acting between a static quark andanti-quark [2]. This first principles quantity is defined from the spectral structure of the real-time Wilson loop using aneffective field theory framework [3], freeing us from the need for potential models. Studies of quarkonium of finite masson the lattice, using a discretized variant of the effective field theory NRQCD, also benefit from improved spectral functiondetermination, allowing us to probe more reliably the melting behavior of these bound states [4].

[1] Y.Burnier, A.R., Phys.Rev.Lett. 111 (2013) 182003[2] Y.Burnier, O. Kaczmarek and A.R., Phys.Rev.Lett. 114 (2015) 8, 082001[3] A.R., T. Hatsuda and S. Sasaki, Phys.Rev.Lett. 108 (2012) 162001[4] S. Kim, P. Petreczky and A.R., Phys.Rev. D91 (2015) 054511

Primary authors : ROTHKOPF, Alexander Karl (Institute for Theoretical Physics, HeidelbergUniversity)

Co-authors :

Presenter : ROTHKOPF, Alexander Karl (Institute for Theoretical Physics, Heidelberg University)




Submitted on Monday 25 May 2015

Last modified on : Monday 25 May 2015

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STRANGENESS IN QUARK MATTER 2... / Abstracts book In-medium heavy quarkonium from lattice QCD spectr...


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STRANGENESS IN QUARK MATTER 2... / Abstracts book In-medium heavy quarkonium from lattice QCD spectr...


Abstract ID : 204

Hyper nucleus production in heavy ioncollision experiments

Content :

In the last decade, heavy ion collision experiments have brought new insight on the study of hypernucleus. Experimentsusing ion induced reactions for hypernuclear research focus on two distinct aspects: the spectroscopy and probing thenuclear reaction. In the case of the experimental spectroscopy, the internal structure of hypernuclei is investigated in orderto determine the baryon-baryon interaction in the strangeness sector for the hyper-matter equation of state. Thedynamical aspect of the nucleus-nucleus reaction can also be explored by studying the production of hypernuclei. In thistalk, the experimental observations of the production mechanisms responsible for the formation of the hypernuclei in ioncollisions will be presented. Depending of the center-of-mass energy and the type of experiment (fixed target or collider),hypernuclei can be produced in the mid-rapidity and/or in the spectator regions. The experimental results from both caseswill be presented and discussed during the talk.

Primary authors : RAPPOLD, Christophe (Giessen University - GSI Helmholtz Centre for HeavyIon Research)

Co-authors :

Presenter : RAPPOLD, Christophe (Giessen University - GSI Helmholtz Centre for Heavy Ion Research)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Hyper nucleus production in heavy ion collision ex...


Abstract ID : 205

Strangeness and light flavor productionwith ALICE

Content :

The main goal of the ALICE experiment at the LHC is to study the properties of the deconfined state of matter known asthe Quark-Gluon Plasma (QGP), created in ultrarelativistic heavy ion collisions. In this context, strangeness and lightflavor observables allow for the characterization of the bulk properties of the QGP. In this talk, we report on the extensivelight flavor hadron measurements performed by ALICE, ranging from identified particle spectra to exotica and resonanceproduction. In Pb-Pb collisions, a centrality dependent survey of such observables provides information on the collectiveexpansion of the fireball as well as on the onset of a thermally equilibrated hadrochemical regime. Measurementsperformedat higher transverse momenta also shed light on the parton energy loss in the hot and dense medium created in suchcollisions.For the smaller systems created in p-Pb collisions, the study of multiplicity dependence of light flavor particle productionallows for understanding effects of cold nuclear matter and thus the disentanglement of initial and final state effects.Finally, an important contribution to the understanding of collective phenomena may also come from measurementsperformed in pp collisions as a function of charged particle multiplicity.

Primary authors : CHINELLATO, David (UNICAMP / Brazil)

Co-authors :

Presenter : CHINELLATO, David (UNICAMP / Brazil)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Strangeness and light flavor production with ALICE


Abstract ID : 206

Study of Hyperon Interaction viaHeavy-Ion Collisions from STAR

CollaborationContent :

The information on the hyperon-hyperon interaction is crucial for our understanding of various baryon-baryoninteractions in hot and dense medium from both high-energy nuclear collisions and the equation of state for neutron stars.In this talk, I would discuss the recent progress on hyperon-hyperron interaction from STAR data analysis. I would focuson the H-particle search effort in our collaboration and discuss the future of this program.

Primary authors : CHEN, Jinhui (for the STAR Collaboration)

Co-authors :

Presenter : CHEN, Jinhui (for the STAR Collaboration)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Study of Hyperon Interaction via Heavy-Ion Collisi...


Abstract ID : 207

Relativistic Electro-Magneto-FluidDynamics

Content :

Traditionally fluid flow influenced by electric and magnetic fields has been divided into two separate, simplifiedcategories, namely electro-hydrodynamics (EHD) studying flows under the influence of an electric field with free electriccharges and no magnetic field, and magneto-hydrodynamics (MHD) studying flows under the influence of a magneticfield and no free electric charges or electric fields. This division was necessary to reduce the extreme complexity of thecoupled system of Navier-Stokes, Maxwell's and constitutive equations describing combined electro-magneto-fluiddynamic (EMFD) flows. In this paper, the unified relativistic EMFD theory is presented. This formulation allows discussionof the relative importance of terms describing the electro-magnetic force, electric current and dissipative fluxes. Theapproach is based on the fundamental laws of continuum electrodynamics and thermodynamics. The resulting relativisticEMFD model represents a tractable set of equations suitable for detailed numerical discretization and integration.Electro-Magneto-Fluid-Dynamics therefore provides an innovative account of the state-of-the-art in mathematicalmodelling and numerical simulation of combined electro-magneto-fluid-dynamics (EMFD), governing fluid flows underthe influence of electric and magnetic fields. The development of the relativistic EMFD model is important in the study ofthe equation of state and transport properties of compact stars andsupernova matter.

Primary authors : MURONGA, Azwinndini (University of Johannesburg, South Africa)

Co-authors :

Presenter : MURONGA, Azwinndini (University of Johannesburg, South Africa)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Relativistic Electro-Magneto-Fluid Dynamics


Abstract ID : 208

Approaches to QCD phase diagram;effective models, strong coupling lattice

QCD, and compact starsContent :

QCD phase diagram is attracting much attention in these years. It is now extensively studied in the Beam Energy Scan(BES) program at RHIC, and is closely related to the beginningof our universe (big bang) and the final form of matter (neutron stars). The robust mechanism for the QCD phasetransition is the spontaneous chiral symmetry breakingand restoration. The spontenous symmetry breaking is well understood in chiral effective models of QCD such as theNambu-Jona-Lasinio model; zero-point energy of quarks favors finite chiral condensate. By using the high-temperatureexpansion, the transition temperature is found to decrease with increasing chemical potential. In the first lecture (duringthe dense matter school), I explain the basic mechanism of the chiral phase transition in effective models, and the expectedshape of the phase boundary using the high-temperature expansion. I also introduce the strong coupling lattice QCD, inwhich we can examine that the same mechanism applies to QCD at strong coupling. Discovery of the QCD critical pointand the first order phase transition at high density is one of the ultimate goals in the BES program and forthcoming FAIRand NICA fascilities, and heavy-ion programs at J-PARC. We also expect formation of dense matter in compactastrophysical phenomena, such as the neutron star core, supernova explosion, dynamical collapse to black holes, andbinary neutron star mergers. From the theoretical side, it is desirable to draw the QCD phase diagram using the latticeQCD Monte-Carlo simulations. However, the sign problem in lattice QCD at finite chemical potential causes difficulty inperforming precise Monte-Carlo simulations of finite density matter. There are some exceptions such as the color SU(2)QCD, finite isospin chemical potential, or imaginary chemical potential.The strong coupling lattice QCD can be one of these exceptions; while the sign problem exists, it is milder and twoindependent methods predict the same QCD phase boundary.In the second lecture (during SQM), we discuss the phase diagram in effective models and the strong coupling lattice QCD,and some observables expected to appear around the critical point. We also discuss the thermodynamic conditions realizedduring the failed supernova, where the black hole is formed dynamically. We find that cold, dense, and isospin asymmetricmatter is formed during the black hole formation, and it may be possible to sweep the QCD critical point in compact starphenomena.

Primary authors : OHNISHI, Akira (YITP, Kyoto University)

Co-authors :

Presenter : OHNISHI, Akira (YITP, Kyoto University)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Approaches to QCD phase diagram; effective models,...


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STRANGENESS IN QUARK MATTER 2... / Abstracts book Approaches to QCD phase diagram; effective models,...


Abstract ID : 209

STUDYING QUARK CONDENSATESWITHIN MODELS OF FOUR-QUARK

INTERACTIONSContent :

Analyzing two models of four-quark interactions which are of intrinsic difference in the behaviors of their correlationlengths, but permitting an analytical consideration, we reach some conclusions insightful for a wide spectrum of theoriesat finite temperatures and quark densities. In particular, it is demonstrated that the quark condensates are substantially notsensitive to the details of those interactions in the range of coupling constants interesting for applications.

Primary authors : ZINOVJEV, G. (Bogolyubov Institute for Theoretical Physics, National Academyof Sciences of Ukraine, Kiev, UKRAINE)

Co-authors :

Presenter : ZINOVJEV, G. (Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, Kiev, UKRAINE)

Track classification : Scientific Programme ; Freezeout, Hadronization and Statistical Model (F.Becattini, Florence / R. Stock, Frankfurt)





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STRANGENESS IN QUARK MATTER 2... / Abstracts bookSTUDYING QUARK CONDENSATES WITHIN MODELS OF FOUR-Q...


Abstract ID : 210

Heavy flavor transportContent :

An overview of our current understanding of the behaviour of charm andbeauty quarks in the medium formed in heavy-ion collisions will bepresented. The focus will be on the low and intermediate pT region, wheretransport calculations represent the theoretical tool to describe theirasymptotic approach (in the case of a medium with an infinite lifetime) tokinetic equilibrium; theory results will be compared to the experimentaldata collected in heavy-ion collisions. In particular I will discuss whichpresent and future measurements have the potential to provide the cleanestinformation on the medium transport coefficients. Finally I will discusswhat one expects for heavy-flavour obesrvables in small systems, like theone produced in p-A collisions.

Primary authors : BERAUDO, Andrea (INFN, ITALY)

Co-authors :

Presenter : BERAUDO, Andrea (INFN, ITALY)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Heavy flavor transport


Abstract ID : 211

Heavy flavor (open and hidden)production and properties of sQGP at

top energiesContent :

Heavy quarks are unique probes to study the strongly coupled Quark-Gluon Plasma created at RHIC. Due to their largemasses, heavy quarks are produced early in the collisions and are expected to interact with the medium differently fromthat of light quarks. Detailed studies on the production of open heavy flavor mesons and heavy quarkonia inheavy-ion collisions and in the baseline $p+p$ and $d+A$ collisions provide crucial information in understanding themedium's properties. With the large acceptance Time Projection Chamber, Time of Flight detector, EM Calorimeter andthe recently installed Heavy-Flavor Tracker and Muon Telescope Detector, STAR can study heavy quark production in awide kinematic range via different decay channels. In this talk, we will review the current status as well as the futureperspectives of heavy quark studies in the STAR experiment.

Primary authors : XIE, Wei (STAR collaboration)

Co-authors :

Presenter : XIE, Wei (STAR collaboration)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Heavy flavor (open and hidden) production and prop...


Abstract ID : 212

Charmonium results in p-Pb and Pb-Pbcollisions from ALICE

Content :

Heavy quarkonia production in ultra-relativistic nuclear collisions is a sensitive probe into the conditions of the hot QGPmedium, such as energy density and temperature. Their production rates are sensitive also to the total heavy quarkcross-sections and cold nuclear matter (CNM) effects. The latter can be investigated in p-Pb collisions, where theproduction of QGP is not expected. Covering a large rapidity range ($|y_{lab}|<0.9$ and $2.5<y_{lab}<4.0$) down to zerotransverse momentum, with its central barrel and forward muon spectrometer,ALICE is capable of providing differential and total cross-section measurements for charmonium ($J/\psi$ and $\psi(2S)$)and bottomonium ($\Upsilon$) states. In this talk we will present an overview of the ALICE results on heavy quarkonia inPb-Pb collisions at $\sqrt{s_{NN}}=$~2.76 TeV and p-Pb collisions at $\sqrt{s_{NN}}=$~5.02 TeV obtained from the LHCRun-1 data. The current understanding of these results will be discussed using comparisons to theoretical expectations.

Primary authors : ARSENE, Inout (ALICE collaboration)

Co-authors :

Presenter : ARSENE, Inout (ALICE collaboration)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Charmonium results in p-Pb and Pb-Pb collisions fr...


Abstract ID : 213

QCD Hadronization and the StatisticalModel

Content :

Hadro-chemical freeze-out in relativistic central collisions of heavy nuclei produces the multiplicities of all observedhadronic species, from pions to Omega hyperons. From top SPS energy onward to top RHIC energy the non-charmedyields have been described well by the grand canonical Gibbs ensemble implied in the Statistical HadronizationModel(SHM).The principal parameters, freeze-out temperature T and baryochemical potential mu(B), exhibited a smooth,monotonous freeze-out curve in the (T,mu(B)) plane, slightly ascending from (158MeV, 247MeV) at 17.3 GeV to (165MeV,20MeV) at 200 GeV(1). As concurrent predictions(2) of Lattice QCD resulted in a (T,mu(B)) hadronization curve veryclosely coinciding with the SHM freeze-out curve it was concluded(3) that the two processes occur at the same instant, orat least very closely connected, during the expansive evolution at small mu(B). SHM analysis thus appeared to locate theQCD parton-hadron phase transformation line, with T = 165MeV near mu(B) = 0.

This harmonious picture is in need of revision/modification, due to several recent developments:1. At 2.76TeV LHC energy the SHM fits were unsatisfactory, mostly due to the p and pbar multiplicity values. A"compromise" SHM fit leads to a lower temperature, of about 156MeV, at mu(B) practically zero(4). A kink in thehadronization curve?2. The lattice community has revised the pseudocritical T at mu(B) = 0, down from 165MeV to 155MeV(5). How about theSHM fits with T = 165MeV, at finite mu(B)?3. It was discovered in a UrQMD study(6) that the post-hadronization expansion process indeed leaves the bulk mesonyields essentially unchanged but that the baryon/antibaryon sector is significantly affected by final state annihilation (andregeneration) corrections. Taking those into account the temperature at the LHC rises back to 164MeV(6).4. It was conjectured that a universal hadronization temperature might be untenable, with strangeness hadronizing atsubstantially higher T than nonstrange hadrons. Practically an additional parameter, to restore the SHM problems?

We will discuss these observations but have to leave the paradox fact unexplained that Lattice QCD now predicts a lowertemperature than the SHM. We will also take a look at the SHM analysis at high mu(B), i.e. down to AGS (and futureNICA and FAIR) energies. We present a re-analysis at AGS energy. What are we freezing-out from, here? Is there a similargrandcanonical equilibrium here, and how could it arise without the"synchronization" by a phase transition?

1. A.Andronic et al., Nucl.Phys. A772(2006)167; F.Becattini and R.Fries,arXiv:0907.10312. G.Enrodi et al., JHEP1104(2011)001; O.Kaczmarek et al.,Phys.Rev.D83(2011)0145043. R.Stock, Phys.Lett. B456(1999)277; P.Braun-Munzinger et al.,Phys.Lett.B596(2004)614. M.Floris, Nucl.Phys.A931(2014)c1035. F.Karsch, arXiv:1312.7659; T.Bhattacharya et al., PRL 113(2014)0820016. F.Becattini et al., Phys.Rev.Lett.111(2013)082302; Y.Pan and S.Pratt,arXiv:1210.15777. R.Bellwied et al., Phys.Rev.Lett.111(2013)202302

Primary authors : STOCK, Reinhard (IKF and FIAS, University of Frankfurt/Main, Germany)

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Presenter : STOCK, Reinhard (IKF and FIAS, University of Frankfurt/Main, Germany)

STRANGENESS IN QUARK MATTER 2... / Abstracts book QCD Hadronization and the Statistical Model







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STRANGENESS IN QUARK MATTER 2... / Abstracts book QCD Hadronization and the Statistical Model


Abstract ID : 214

Investigation of Hypernuclei withNuclotron Beams

Content :

At the Laboratory of High Energies (JINR, Dubna) a unique approach was elaborated with hypernuclei produced by theexcitation of the accelerator beam nuclei and decay observed at adistance of tens of cm behind the production target. While the very first experiments were carried out in theSynchrophasotron beams, more extensive hypernuclei research programme is planned for the Nuclotron accelerator andthe new spectrometer created by the authors (Hypernuclei and NIS experiments). Investigation of hydrogen hypernucleiisotopes is in the first line of the experimental research plans. Namely, lifetimes and cross sections of 4ΛH and 3ΛH searchfor 6ΛH is among the tasks. The very first experiment can be the investigation of 6ΛHe.Meanwhile, we should underline that the spectrometer was created by united team and should be operated by the samepersonal, so, it seems that in the future the research programme should be common or strongly correlated. Thus, wepropose to use new spectrometer for research of several flavor physics items: hypernuclei and Nucleon IntrinsicStrangeness (NIS) investigation.

Primary authors : KOROTKOVA, Anna (JINR)

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Presenter : KOROTKOVA, Anna (JINR)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Investigation of Hypernuclei with Nuclotron Beams


Abstract ID : 215

Fluctuation effects on the quark matterunder strong magnetic field

Content :

We study quark-meson plasma in strong magnetic field in the frame of two-flavor Nambu-Jona-Lasinio Model. Thecritical temperature of chiral phase transition is calculated to the order of 1/Nc, including meson fluctuations as a runningcoupling constant. We calculated the magnetic field dependence of thermodynamic functions and make comparison withthe lattice results.

Primary authors : SHIJUN, Mao (Xian Jiaotong University)

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Presenter : SHIJUN, Mao (Xian Jiaotong University)




Submitted on Friday 19 June 2015

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Fluctuation effects on the quark matter under stro...


Abstract ID : 216

Cosmological Implications of StrangeQuark Matter, hint of Cold Dark Matter

Content :

The possibility that the relies of quark hadron phase transition in the microsecond old universe, the quark nugget maywell be reasonable candidates for cold dark matter is critically examined.

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STRANGENESS IN QUARK MATTER 2... / Abstracts book Cosmological Implications of Strange Quark Matter,...


Abstract ID : 217

Inhomogeneous chiral symmetrybreaking in compact stellar matter

Content :

We investigate the phase structure of strong-interaction matter within a two-flavor Nambu–Jona-Lasinio model. Earlier itwas shown for degenerate quark flavors that the appearance ofchiral symmetry-breaking phases with spatially modulated order-parameters is possible. Since this might have significantconsequences on the physics of compact stars, we analyze the emer-gence of these inhomogeneous phases in isospin asymmetric and charge neutral matter by allowing the order-parameter tobe spatially modulated. We find that the formation of inhomogeneouschiral symmetry-breaking phases is still possible with an imbalance in the quark numbers. While enforcing equal quarkperiodicities, the appearance of such inhomogeneous phases is energeti-cally disfavored in isospin asymmetric matter. However, by allowing unequal quark periodicities it is found that theinhomogeneous phase can be stabilized against the additional pairing stress.To provide possible signatures of inhomogeneous chiral symmetry breaking from experimental observation, wefurthermore determine the equation of state and the mass-radius relation for aquark star.

Primary authors : NOWAKOWSKI, Daniel (Institut f ■ ur Kernphysik, Technische Universit ■atDarmstadt)

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Presenter : NOWAKOWSKI, Daniel (Institut f ̈ ur Kernphysik, Technische Universit ̈at Darmstadt)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Inhomogeneous chiral symmetry breaking in compact ...


Abstract ID : 218

Matching Hagedorn mass spectrum toLattice QCD

Content :

Recent lattice QCD studies suggest that there are missing resonances in the strange sector of the hadron resonance gasmodel. We show how an improved fit for the Hagedorn mass spectrum, consistent with lattice QCD data for both equationof state and fluctuations of conserved charges, can account for these missing resonances.

Primary authors : MARCZENKO, Michael (Institute of Theoretical Physics, Poland)

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Presenter : MARCZENKO, Michael (Institute of Theoretical Physics, Poland)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Matching Hagedorn mass spectrum to Lattice QCD


Abstract ID : 219

HOW WAS THE FINE-STRUCTURECONSTANT INCONSTANT?

Content :

The fine-structure constant plays an important role in a measurement of the strength of the electromagnetic interactionand it quantities the strength with electrons bind within atoms andmolecules. A new method provides complementary constraints on its value with the most precise estimations made so far.

Primary authors : DUC, Le (Department of Physics, Center for Natural Science, Vietnam)

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Presenter : DUC, Le (Department of Physics, Center for Natural Science, Vietnam)





Last modified on : Friday 26 June 2015

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STRANGENESS IN QUARK MATTER 2... / Abstracts bookHOW WAS THE FINE-STRUCTURE CONSTANT INCONSTANT?


Abstract ID : 220

LATTICE QCD WITH NONZEROCHIRAL DENSITY

Content :

The phase diagram of two-color QCD with non-zero chiral chemical potential is studied by means of lattice simulations.The main focus is on the inuence of a chiral chemical potential on the connement/deconnement phase transition and thebreaking/restoration of chiral symmetry. The simulation is carried out with dynamical staggered fermions. Thedependences of the Polyakov loop, the chiral condensate and the corresponding susceptibilities on the chiral chemicalpotential and the temp erature are presented. The critical temperature is observed to increase with increasing chiralchemical potential.

Primary authors : KOTOV, Andrey (ITEP)

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Presenter : KOTOV, Andrey (ITEP)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book LATTICE QCD WITH NONZERO CHIRAL DENSITY


Abstract ID : 221

NUCLEUS PROBING FORSHORT-RANGE CORRELATIONS

(SRC) USING NEUTRINO-NUCLEONINTERACTIONS.

Content :

Short-range, nucleon-nucleon correlations (NN SRC) contain important information on nuclear structure and dynamicswithin nuclei. NN SRC have been extensively studied through two-nucleon knockout reactions in both pion and electronscattering experiments. A very recent approach is to probe NN SRC using neutrino scattering, however, with limitedresults due to the intrinsic uncertainty of the four-momentum transfer. Here, we present one of the latest approaches toreconstruct this information.

Primary authors : NIEWCZAS, Kajetan (Institute of Theoretical Physics, University of Wroclaw)

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Presenter : NIEWCZAS, Kajetan (Institute of Theoretical Physics, University of Wroclaw)






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STRANGENESS IN QUARK MATTER 2... / Abstracts bookNUCLEUS PROBING FOR SHORT-RANGE CORRELATIONS (SRC)...


Abstract ID : 222

MAKING A SOFT EOS HARD WITHINRMF MODELS

Content :

We consider a non-linear Walecka-type model including nucleons interacting with scalar, vector and isovector mean fieldsand the scalar field self-interaction. In such a model the magnitude of the scalar field increases monotonically with thenucleon density, and, therefore, the nucleon mass decreases.We demonstrate that if the scalar field decrease is brought to astop at some density $n_{\rm cut}$ and remains constant at higher densities, the equation of state becomes stiffer and themaximum possible mass of a neutron star increases. Such a saturation can be reached by inclusion an additional term tothe scalar potential being very small for densities $n<n_{\rm cut}$, rapidly increasing in a narrow vicinity of $n_{\rm cut}$and staying constant at higher densities. This offers a simple method to harden the equation of state at higher densitieswithout altering it at densities around the saturation density, thus providing a way to deal with the problem of thelowering of a limiting NS mass after the inclusion of strangeness content.

Primary authors : MASLOV, Konstantin (NRNU MEPhI, Moscow, Russia)

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Presenter : MASLOV, Konstantin (NRNU MEPhI, Moscow, Russia)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book MAKING A SOFT EOS HARD WITHIN RMF MODELS


Abstract ID : 223

PHASE DIAGRAM IN ENTAGLEMENTPNJL MODEL

Content :

Effects of vector interaction in Nambu-Jona-Lasinio model with Polyakov loop are studied in combination withentanglement interaction between quark and pure gauge sector. We investigate the QCD phase diagram and find that thefirst order chiral phase transition at finite baryon chemical potentials and its critical point disappear for sufficiently largevalues of Gv. At that time presence of entanglement interaction between quark and pure gauge sector leads to increasingof value Gv when the first order transition disappears. The influence of non-zero Gv on the curvature of the crossoverboundary in the T- plane close to =0 is also examined for both cases.

Primary authors : FRIESEN, Aleksandra (BLTP JINR)

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Presenter : FRIESEN, Aleksandra (BLTP JINR)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book PHASE DIAGRAM IN ENTAGLEMENT PNJL MODEL


Abstract ID : 224

CONFORMAL EFFECTS INSUPERGRAVITY: BACKREACTED

DIRAC DELTA SOURCESContent :

We construct numerically gravitational duals of theories deformed by Localized Dirac delta sources for scalar operatorsboth at zero and at finite temperature. We find that requiring that the backreacted geometry preserves the original scaleinvariance of the source uniquely determines the potential for the scalar field to be the one found in a certain Kaluza-Kleincompactification of 11D supergravity. This result is obtained using an efficient perturbative expansion of the backreactedbackground at zero temperature and is confirmed by a direct numerical computation. Numerical solutions at finitetemperatures are obtained and a detailed discussion of the numerical approach to the treatment of the Dirac delta sourcesis presented.

Primary authors : JANKOWSKI, Jakub Marek (Jagiellonian University, Poland))

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Presenter : JANKOWSKI, Jakub Marek (Jagiellonian University, Poland))






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STRANGENESS IN QUARK MATTER 2... / Abstracts bookCONFORMAL EFFECTS IN SUPERGRAVITY: BACKREACTED DI...


Abstract ID : 225

TOPOLOGICAL SUSCEPTIBILITYFROM N_F= 2+1+1 FLAVOUR QCD

AT NONZERO TEMPERATUREContent :

We present the results for topological susceptibility at nonzero temperature obtained from lattice QCD with fourdynamical quarks. We apply several smoothing methods before calculation of susceptibility, including gradient Wilsonflow and over-improved cooling. It is shown that considered smearing techniques are basically well coincide among eachother, and there is simple scaling relation between flow time and number of cooling steps.

Primary authors : TRUNIN, Anton (BLTP JINR)

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Presenter : TRUNIN, Anton (BLTP JINR)






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STRANGENESS IN QUARK MATTER 2... / Abstracts bookTOPOLOGICAL SUSCEPTIBILITY FROM N_F= 2+1+1 FLAVOUR...


Abstract ID : 226

RADIATION TOLERANCE OFMICROSTRIP SENSORS FOR THE

CBMContent :

The Compressed Baryonic Matter (CBM) experiment will be one of the major scientific pillars of the future Facility forAntiproton and Ion Research (FAIR) in Darmstadt. The goal of the CBM research program is to explore the QCD phasediagram in the region of high net baryon densities and moderate temperatures using high-energy nucleus-nucleuscollisions. The Silicon Tracking System (STS), the core detector of CBM experiment located in the dipole magnet, providestrack reconstruction and momentum determination ofcharged particles originating from beam-target interactions. The STS will consist of eight planar tracking stationsemploying ~ 1300 double sided silicon microstrip sensors on modular structures that keep readout electronics outside thephysics aperture. A response of double-sided silicon micro-strip sensors to the hits by charged particles will be used for thetrack reconstruction. Radiation load expected in the CBM experiment may significantly influence this response. Thedevelopment of radiation tolerant prototype STS microstrip sensors irradiated up to2*10^14 1-MeV n_eq/cm^2 will be overviewed. Supported by HIC for FAIR and HGS-HIRe.

Primary authors : MOMOT, Ievgeniia (Goethe University Frankfurt, Germany)

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Presenter : MOMOT, Ievgeniia (Goethe University Frankfurt, Germany)






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STRANGENESS IN QUARK MATTER 2... / Abstracts bookRADIATION TOLERANCE OF MICROSTRIP SENSORS FOR THE ...


Abstract ID : 227

OUR UNDERSTANDING ONLANDAU-RAYCHAUDHURI

COSMOLOGYContent :

In research for phenomenology of quantum gravity and defining cosmological consequences, generalized uncertaintyprinciples and modified dispersion relations are much like two faces for one coin which apparently plays an important rolein estimating the possible modifications of the black hole thermodynamics and the Friedmann equations. We firstreproduce the horizon area for different types of black holes and investigate the quantum corrections toBekenstein-Hawking entropy (entropy-area law). Based on this, we study further thermodynamical quantities andaccordingly the modified Friedmann equation in four-dimensional de Sitter-Schwarzschild, Reissner-N\"{o}rdstrom andGarfinkle-Horowitz-Strominger black holes. In FLRW universe, the modified Landau-Raychaudhuri equations and theirrelation to singular solutions are discussed.

Primary authors : TAWFIK, Abdel Nasser (Egypt Center for Theoritical Physics ,MTI University,Faculty of Engineering)

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Presenter : TAWFIK, Abdel Nasser (Egypt Center for Theoritical Physics ,MTI University, Faculty of Engineering)






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STRANGENESS IN QUARK MATTER 2... / Abstracts bookOUR UNDERSTANDING ON LANDAU-RAYCHAUDHURI COSMOLOG...


Abstract ID : 228

IMPORTANCE OF DIFFERENTENERGY LOSS EFFECTS IN JET

SUPPRESSION AT RHIC AND LHCContent :

High momentum hadron suppression is considered to be excellent tool for studying the properties of QCD matter createdin ultra-relativistic heavy ion collisions. For this study we use our recently developed dynamical energy loss formalism [1],which includes the following key effects: i) dynamical scattering centers, ii) QCD medium of a finite size, iii) bothradiative and collisional energy losses, iv) running coupling and v) finite magnetic mass. We further incorporate thisformalism into numerical procedure [1] in order to generate suppression predictions, by using no free parameters, whichwe then compare with experimental suppression data. A robust agreement of our predictions with experimentallymeasured RAA for different experiments (RHIC and LHC), probes and all available centrality regions [1,2], raised thequestion whether this agreement is consequence of a single effect or of a superposition of all these effects. This question issignificant, since other pQCD energy loss models neglect some or most of these features. In order to systematically resolvewhich of these different energy loss effects (all required based on theoretical grounds) has significant impact on accuratelyexplaining the data, we choose the clear energy loss probe – D meson suppression (since fragmentation function does notalter bare charm quark suppression) . We here concentrate on central 200 GeV Au+Au collisions at RHIC and 2.76 TeVcollisions at LHC, and start from static approximation and gradually add different effects in our calculations [3]. Inparticular, we study the importance of abolishing static in favor of dynamical approximation and of including collisionalenergy loss, finite size effects, running coupling and finite magnetic mass, where the recently available LHC RAA dataserve as a benchmark for assessing the importance of each effect. We obtained that, although the inclusion of dynamicalscattering center has the largest relative importance, all the other effects are also important, since they lead to fineimprovements of the agreement. Therefore, the robust agreement is a cumulative effect of all these features, withdynamical effects being crucial for accurate energy loss expressions.[1] M. Djordjevic and M. Djordjevic, Phys. Lett. B 734 (2014) 286.[2] M. Djordjevic, M. Djordjevic and B. Blagojevic , Phys. Lett. B 737 (2014) 298.[3] B. Blagojevic and M. Djordjevic, Journal of Phys. G, in press (2015).

Primary authors : BLAGOJEVIC, Bojana (Institute of Physics, University of Belgrade)

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Presenter : BLAGOJEVIC, Bojana (Institute of Physics, University of Belgrade)






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STRANGENESS IN QUARK MATTER 2... / Abstracts bookIMPORTANCE OF DIFFERENT ENERGY LOSS EFFECTS IN JET...



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STRANGENESS IN QUARK MATTER 2... / Abstracts bookIMPORTANCE OF DIFFERENT ENERGY LOSS EFFECTS IN JET...


Abstract ID : 229

HYDRODYNAMIC MODELLING OFQGP EXPANSION USING AN EXACTSOLUTION OF RIEMANN PROBLEM

Content :

Hydrodynamic modeling of quark-gluon plasma requires sophisticated numerical schemes that have low numericalviscosity and are able to cope with high gradients of energy density that may appear in initial conditions. We propose touse the Godunov method with an exact Riemann solver for ideal hydrodynamic modeling to meet these conditions. Wepresent the results of numerical tests of the method, such as the sound wave propagation and the shock tube problem,which show both high precision of the method and low numerical viscosity.

Primary authors : FECKOVA, Zuzana (P. J. Safarik Univeristy, Kosice, Slovakia)

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Presenter : FECKOVA, Zuzana (P. J. Safarik Univeristy, Kosice, Slovakia)






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STRANGENESS IN QUARK MATTER 2... / Abstracts bookHYDRODYNAMIC MODELLING OF QGP EXPANSION USING AN E...


Abstract ID : 230

FLOW VISCOSITY WITH A RUNNINGCOUPLING

Content :

Evidence from heavy ion experiments at the LHC and RHIC has supported the existence of a QGP phase of matter. Theindications are that the QGP is strongly coupled and behaves as an almost ideal fluid. It is widely believed that theobserved (f)low viscosity of the QGP cannot be explained on perturbative grounds. In this talk, we will discuss the resultof a calculation with a scale dependent coupling, within the framework of 1-loop resummed QCD. This will involveproperly renormalising the vacuum quantum corrections to the transport cross section. We find a fairly small viscosity toentropy ratio, η/s < 0.5, which only mildly increases with T.

Primary authors : JACKSON, Gregory (University of Cape Town, South Africa)

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Presenter : JACKSON, Gregory (University of Cape Town, South Africa)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book FLOW VISCOSITY WITH A RUNNING COUPLING


Abstract ID : 231

AZIMUTHAL ANISOTROPY OFΦ-MESON IN U+U AND AU+AU

COLLISIONS AT RHICContent :

Azimuthal anisotropy is an important tool for studying the hot and dense matter created in the early stages of high-energyheavy-ion collisions at the Relativistic Heavy Ion Collider (RHIC). It is defined as the nth harmonic coefficients of theFourier decomposition of the azimuthal distribution of produced particles with respect to the reaction plane angle (ψn),and the azimuthal anisotropy can be expressed as vn = (cos (n (φ − ψn))), where φ is the azimuthal angle of producedparticles.

Although the azimuthal anisotropy is an early time phenomenon, its magnitude might still be affected by the later stagehadronic interactions. Since the hadronic interaction cross section of the φ-meson is smaller than most of the hadrons, itsvn coefficients are expected to remain unaffected by the late stage interactions. Therefore, φ-meson vn reflects thecollective motion in the partonic phase. This makes the φ-meson a clean probe for the study of the properties of the mattercreated in heavy-ion collisions.

In 2012, RHIC carried out collisions of deformed nuclei 238U + 238U in hopes of producing higher energy densities andnumber of particles than possible using nuclei like Au+Au. In this work we have studied the centrality dependence of theFourier coefficients v2, v3, v4 and v5 of φ-meson at midrapidity |η| ≤ 1.0, in U+U and Au+Au collisions at √sNN = 193 GeVand 200 GeV, respectively. We have used the η-sub event plane method with a η gap of 0.1 to suppress non-flow effects. Asystematic comparison of these coefficients for the two systems U+U and Au+Au will be presented.

Primary authors : BAIRATHI, Vipul (for STAR Collaboration) School of Physical Sciences, Nat.Institute of Science Education and Research, Odisha, India)

Co-authors :

Presenter : BAIRATHI, Vipul (for STAR Collaboration) School of Physical Sciences, Nat. Institute of Science Education and Research, Odisha, India)






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STRANGENESS IN QUARK MATTER 2... / Abstracts bookAZIMUTHAL ANISOTROPY OF Φ-MESON IN U+U AND AU+AU C...


Abstract ID : 232

THE QUESTION OF EXISTENCE OFTHIRD FAMILY OF COMPACT STARSContent :

Solving the inverse problem of OTV equations, we are investigating the equations of state allowing having a third familyof compact stars.

Primary authors : BOJUKYAN, Vazgen (Yerevan State University, Armenia))

Co-authors :

Presenter : BOJUKYAN, Vazgen (Yerevan State University, Armenia))






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STRANGENESS IN QUARK MATTER 2... / Abstracts bookTHE QUESTION OF EXISTENCE OF THIRD FAMILY OF COMPA...


Abstract ID : 233

GENERATION OF HIGHER FLOWHARMONICS IN PB+PB COLLISIONS

AT LHC IN HYDJET++ MODELContent :

The observed particle distributions in Pb+Pb collisions at LHC are under investigation. Monte Carlo simulations of theazimuthal anisotropy i.e. ow, and transverse momentum spectra provide insights in hadron genesis and in medioscattering. Simulations are made using the HYDJET++ model, which is based on parameterization of soft processes andgeneration of hard physics. The second and third event planes are implemented, thus generating the second and the thirdorder ows which are believed to provide the largest part of the observed azimuthal distribution. The elliptic and triangularow are simulated in good agreement with experimental data for (pT<3:5) GeV and centralities 0

Primary authors : BRUSHEIM, Johansson Bengt Henrik (Department of Physics University ofOslo, Norway)

Co-authors :

Presenter : BRUSHEIM, Johansson Bengt Henrik (Department of Physics University of Oslo, Norway)






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STRANGENESS IN QUARK MATTER 2... / Abstracts bookGENERATION OF HIGHER FLOW HARMONICS IN PB+PB COLLI...


Abstract ID : 234

FLAVOR HIERARCHY INFREEZEOUT

Content :

We investigate the possibility of an earlier freezeout of the strange hadrons in heavy ion collisions by looking at the dataof hadron yields, light nuclei yields and the transverse momentum spectra of hadrons.

Primary authors : CHATTERJEE, Sandeep (Variable Energy Cyclotron Centre, Kolkata, India)

Co-authors :

Presenter : CHATTERJEE, Sandeep (Variable Energy Cyclotron Centre, Kolkata, India)






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STRANGENESS IN QUARK MATTER 2... / Abstracts book FLAVOR HIERARCHY IN FREEZEOUT


Abstract ID : 235

DIRECTED FLOW IN HEAVY-IONCOLLISIONS FROM PHSDTRANSPORT APPROACH

Content :

We study the proton, pion and kaon directed flow for Au+Au collisions at AGS energies (E_{Lab}=2-8 AGeV) and low SPSenergies within the Parton-Hadron-String-Dynamics (PHSD) transport model. PHSD is a microscopic off-shell transportapproach, which successfully describes heavy-ion collisions in a wide range of energies. We investigate the sensitivity ofthe flow observables with respect to momentum-dependent hadronic potentials. This analysis can provide importantinformation on these potentials, since they are known from the G-matrix theory approximately up to twice nuclear matterdensity and consequently extrapolations at higher baryon densities and large momenta have to been probed.

Primary authors : PALMESE, Alessia (Institute of Theoretical Physics, JLU Giessen, Germany)

Co-authors :

Presenter : PALMESE, Alessia (Institute of Theoretical Physics, JLU Giessen, Germany)






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STRANGENESS IN QUARK MATTER 2... / Abstracts bookDIRECTED FLOW IN HEAVY-ION COLLISIONS FROM PHSD TR...


Abstract ID : 236

Entropic and enthalpic phasetransitions in high energy density

nuclear matterContent :

Features of Gas-Liquid (GL) and Quark-Hadron (QH) phase transitions (PT) in dense nuclear matter are under discussionin comparison with their terrestrial counterparts, e.g. so-called "plasma" PT in shock-compressed hydrogen, nitrogen,xenon etc. Both, GLPT and QHPT, when being represented in widely accepted temperature–baryonic chemical potentialplane, are often considered as similar, i.e. amenable to one-to-one mapping by simple scaling. It is argued that thisimpression is illusive and that GLPT and QHPT belong to different classes: GLPT is typical enthalpic PT (e.g.Van-der-Waals-like) while QHPT (i.e. "deconfinement-driven" PT) is typical entropic PT. Subdivision of 1st-orderfluid-fluid phase transitions into two subclasses: enthalpic and entropic PTs (i.e. H-PT and S-PT), was proposed in [arXiv:1504.05850]. Properties of H-PT and S-PT differ significantly. Isostructural entropic PT is always internal part of moreextended thermodynamic anomaly – domain with abnormal (negative) sign for the set of (usually positive) second crossderivatives of thermodynamic potential (e.g. Gruneizen coefficient, thermal expansion coefficient, thermal pressurecoefficient etc.) Entropic PTs have more complicated topology of stable and metastable domains within the two-phaseregion in comparison with enthalpic (VdW-like) PTs. In particular, new additional (third) metastable region, bounded bynew additional spinodal, appears in the case of entropic PT. All abnormal features of entropic PTs have transparentgeometrical interpretation – multi-layered structure of thermodynamic surfaces for temperature, entropy and internalenergy as a pressure-volume functions, e.g. for T(P,V), S(P,V) and U(P,V). Besides GLPT and QHPT one more“strangeness-driven” PT (e.g. Lavagno & Pigato, 2012) is considered and argued to be enthalpic, not entropic one.

Primary authors : IOSILEVSKIY, Igor (Joint Institute for High Temperature (Russian Academy ofScience) Moscow Institute of Physics and Technology (Nat. ResearchUniversity))

Co-authors :

Presenter : IOSILEVSKIY, Igor (Joint Institute for High Temperature (Russian Academy of Science) Moscow Institute of Physics and Technology (Nat. Research University))






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STRANGENESS IN QUARK MATTER 2... / Abstracts book Entropic and enthalpic phase transitions in high e...


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