12 nov 2004 paula bordalo, nupecc-lisbon meting 1 title paula bordalo lip/ist nupecc, lisbon...
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12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 1
Title
Paula BordaloLIP/IST
NUPECC, Lisbon Meeting, 12 November 2004
Hadron Physics at LIP-Lisbon NA38/NA50, Delphi and
COMPASS experiments
Paula BordaloLIP/IST
Laboratory of Instrumentation and
Experimental Particle Physics
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 2
The Laboratory LIP
LIP – Instrumentation and Experimental
Particle Physics Laboratory
Lisbon
Coimbra
Faro
CovilhãFigueira da
Foz
Porto
Two Centres
Coimbra (14 PhD + 20 students) : - detectors, analysis, databases
Lisbon (20 PhD + 22 students) : - acquisition, trigger, analysis, - medical physics and simulations - astroparticles
LIP is a FCT Associate Laboratory which congregates major portugueseexperimental particle physicists
►► one pole at Faro (2 PhD + 4 students) - silicium detectors and medical - applications
►► Many Collaborators
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 3
LIP Experiments @ CERN
CMS
ATLAS
DELPHI
COMPASS
NA38 NA50 Muon production from high energy heavy ion collisions at SPS
Study of the isospin symmetry breaking in the light quark sea of the nucleon from the Drell-Yan process
NA51
Study of hadron structure and hadron spectroscopy with high intensity muon and hadron beams.
Study of proton-proton interactions at the Large Hadron Collider
Study of proton-proton interactions at the Large Hadron Collider
Study of electron-positron interactions at Large Electron
Positron Collider
SPS
LHC
LEP
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 4
Other LIP Experiments
This project aims to construct and explore a net of cosmic rays detectors installed in several high schools connect by the Internet
Cosmic Rays Telescope
PET
Development of Positron Emission Mammography
ESA Restec
Hera-b
Medical Physics
ESA Geant4
EUSO
AMS
Monte Carlo Simulation and Detectors for Creation of Clinical Images
EUSO - Extreme Universe Space Observatory, aims to detect and analyse extreme energy cosmic rays
Development of Geant4 simulations for the EUSO and AMS
New simulation tools for environment radiation and for radiation effects
Alpha Magnetic Spectrometer for antimatter and darkmatter search and cosmic rays studies
Large aperture high-rate spectrometer to measure CP-violation in B-meson decays
CPLEAR Precision measurements of C, CP, CPT-violation on the neutral K-system
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 5
NA38/NA50 experimentsMuon pairs and vector-meson production
studies in high energy heavy ion collisions
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LIP is involved, since the begining, at the CERN/SPS ultrarelativistic Heavy Ion Program
To search Quark Gluon Plasma formation a new state of matter deconfined quarks and gluons
1986-1992 first exploratory progam: NA38
p-U, p-W, O-U and S-U collisions @ 200 GeV/nucleon 1994-2000 second phase progam: NA50
p-A, Pb-Pb interactions @ 450, 158 GeV/nucleon
»» NA38 and NA50 study pairs production,
namely the J/ and’ resonances
NA38 & NA50 Goals
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 7
NA38 & NA50 Collaborations
NA38 is a collaboration of 3 countries and 8 laboratories
Lisbon
CERN
AnnecyLyon
Clermont
Strasbourg
Palaiseau
Orsay
~ 40 collaborators in NA38 --- LIP ~ 20%
LIP responsibilities: - Data acquisition (full resp) - Trigger (shared with LLR)
~ 100 collaborators in NA50 --- LIP ~ 10%
NA50 is a collaboration of 7 countries and 13 laboratories
Cagliari
TorinoBucarest
Yerevan
Moscow
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LIP Group
Conceição Abreu Paula Bordalo Sérgio Ramos
8 Diploma Theses
Gonçalo Borges (05) Helena Santos Catarina Quintans Ruben Shahoian Luca Casagrande Sérgio Silva
PhD Theses in NA50 :
Carlos Lourenço Rui Ferreira Luís Peralta
PhD Theses in NA38:
João Cruz Catarina Quintans Carla Vale Pedro Rato Mendes João Guimarães
Master Theses:
Engineers:
6 Technical Students
Jorge Gomes António Almeida Paulo Gomes
Seniors in NA50:
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NA38 & NA50 Spectrometer
NA38
Sala de triggerSala de controlo
detector de multiplicidade
Calorímetro a 0º
Hodoscópio P2
NA50
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Muon pair mass spectrum
J,’,DY and DD shapes, generated by Monte Carlo and reconstructed as real data
Combinatorial background, mostly coming from and k decays, is extracted from measured like-sign pairs
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J/production results from p-p to Pb-Pb
Glauber fit performed Glauber fit performed for the 450/400/200 for the 450/400/200 GeV p-A data givesGeV p-A data gives abs = 4.1±0.4 mb and and experimental rescaling experimental rescaling factorfactor from 450/400 to from 450/400 to 200 GeV200 GeVResults from Results from O, S O, S light ions light ions induced induced collisions collisions lie onlie on the the extrapolated extrapolated absorption curveabsorption curveTheThe Pb-Pb Pb-Pb
J/J/ production production result is result is significantlysignificantly below the below the curvecurve
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 12
J/anomalous suppression
In Pb-Pb collisions, J/DY as a function of ET exhibits a departure from the absorption curve at mid-centrality, followed by a steady decrease
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 13
First paper on q & g deconfinement observation
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 14
’ suppression
Huge ’ suppression which increases with centrality’ is more suppressed than J/by a factor of 2.5 comparing central to peripheral collisions
’DY ’J/’DY ’J/
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 15
Charmonia Anomalous Suppression
J/is abnormally suppressed in central Pb-Pb collisions
’ is suppressed earlier than J/
Expected by the absorption model (Glauber ) with absabs obtained from p-A data:
absabs = 4.1 = 4.1±0.4 mb±0.4 mb
Charmonia yield measured over expected as a function of centrality
J/DY
’DY
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Enhancement
Already in Sulphur induced reactions the is enhanced
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 17
DELPHIStudy of electron-positron interaction at
LEP:QCD studies
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 18
July 2004…on behalf of the LIP DELPHI/QCD groupPedro Abreu
RUN 323, EVT 517 (the first Z0... )
Z0qq
-
14 Aug 1989
..
.
RUN 117588, EVT 1128 (...but not the last!)
Z0bb+ --
Oct
20
00
(3p. /12)The QCD subgroup
Collaboration in DELPHI experiment
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 19
6 articles published in journals, of LIP responsability
11 Oral Presentations in International Conferences, on behalf of the DELPHI Collaboration1 Ph. D. Thesis in Physics concluded, 1 Ph. D. Thesis in progress
Co-Coordination of DELPHI - QCD/ Research Line• Charged particle multiplicities in Z & WW hadronic
Decays
• Studies in quark and gluon jets, in three jets Z events
• Differences in multiplicities in b and light quark events• Colour Reconnection in WW Decays• Search for Pentaquarks in Z hadronic decays
16 Communications to International Conferences
QCD activities in DELPHI (1996-)
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 20
COMPASSCOMMON MUON and PROTON APPARATUS
for STRUCTURE and SPECTROSCOPY
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 21
COMPASS Collaboration
12 Countries, 23 Labs, 230 Physicists (7 from LIP )
Bielefeld, Bochum, Bonn (ISKP & PI), Erlangen, Freiburg, Heidelberg, Mainz, München (LMU & TU)
Helsinki
Saclay
Tel Aviv
Burdwan, Calcutta
Torino(University,INFN),
Trieste(University,INFN)
Warsaw (SINS), Warsaw (TU)
CERN
Nagoya
Prag
Dubna (LPP and LNP), Moscow (INR, LPI, State University), Protvino
Lisbon
LIP
2002
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 22
Physics COMPASS goals
nucleon spectroscopy
Primakoff reactions-polarizability of and K
Exotic hadrons:-glueballs (gg) -hybrids (qqg)-pentaquarks (qqqqq) …
charmed mesons and baryons
-semi-leptonic decays-double-charmed baryons
nucleon spin structure
Gluon Polarization G/G
transverse spin structure function qT(x)
Flavour dependent polarized quark helicity densities q(x)
spin dependent fragmentation functions D
Diffractive VM production
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 23
SM1 dipoleSM1 dipole
SM2 dipole
Polarised Target
HCAL1
Muon-filter1,MW1SPS 160 GeV 2.108/spill
Micromegas,DC,SciFi
Gems,SciFi,DCs,straws
MWPC Gems Scifi
trigger-hodoscopes
Silicon
RICH_1
BMS
Gem_11
ECAL2,HCAL2
straws,MWPC,Gems,SciFi
straws Muon-
filter2,MW2
DW45
SciFi
Veto
Beam:160 GeV µ+
2 . 108 µ/spill
(4.8s/16.2s)
P ~ 80%
COMPASS spectrometer
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 24
Drift
GEM
Straw
SciFi
Inside RICH1Vessel
COMPASS detectors
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 25
Detector Coord Efficiency ResolutionScintillating fibers 21 94% 130 μm
Silicon Detectors 21 98% 9 μm
MicroMegas 12 95-98% 70 μm GEM detector 40 95-98% 50 μm
Drift Chambers 24 94-97% 170 μmStraw tubes 18 > 90% ~ 270 μmMWPC 32 97-99% 2/(12)1/2 mm
MicroMegas GEMs DriftChambers Straws
overall tracking effiency : 80 to 95 %
COMPASS detector performances
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 26
Detectors Control System
DCS – full LIP responsibility
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 27
Excellent for non-perturbative & perturbative physics
- small xBj & very small Q2 Q2 > 100
(GeV/c)2
COMPASS acceptance
Q2 > 1 (GeVc)2
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 28
2004
19
2002 2003 2004
Beam (1) (days) 70 83 106
Luminosity (cm-2) 1039 1.2x1039 ~ 2.4x1039
Events (x109) 5.8 8.6 ~14
TeraBytes 200 300 >450
(1) Scheduled beam excluding MDs and Experiment Setting up
DATA ANALYSIS2002: full data set analyzed2003: data produced (1st phase), preliminary analysis2004: a small sample …
Muon beam Hadron beam
Data taking 2002 - 2004
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 29
• Longitudinal spin :
G/G – from open charm G/G - Spin asymmetry from high pT hadrons pairs
inclusive A1d
(Flavour decomposition of polarized PDF)
• Transverse spin : Collins/Sivers asymmetry Λ & Λ hyperons, production and polarization (Vector meson production ρ, and J/ψ). Exclusive production
COMPASS physics results
12 Nov 2004 Paula Bordalo, NUPECC-Lisbon meting 30
Summary
The envolvement of LIP in Hadronic Physics isrelevant:
Large participation in the Heavy Ion experimentsNA38 / NA50 at CERN/SPS
Participation in the Delphi/LEP experiment
Participation in the COMPASS/SPS experiment