athic2008, 14/oct/2008, tsukuba, japanshinichi esumi, univ. of tsukuba, japan1 collective expansion...

51
ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsu kuba, Japan 1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics 1. Thermal, chemical freeze-out 2. Radial, elliptic expansion 3. Jet modification

Upload: dora-neal

Post on 15-Jan-2016

224 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 1

Collective Expansion of QGP

ShinIchi EsumiUniv. of Tsukuba, Inst. of Physics

1. Thermal, chemical freeze-out2. Radial, elliptic expansion3. Jet modification

Page 2: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 2

QGP

Hadron

Page 3: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 3

t

z

SPS (17GeV)SPS (17GeV)

LHC(5500GeV)LHC(5500GeV)

AGS (4GeV)AGS (4GeV)

RHIC(200GeV)RHIC(200GeV)

BNLBNL CERNCERN

thermal freeze-out

thermal freeze-outchemical freeze-out

chemical freeze-outquark gluon plasma

quark gluon plasma

Page 4: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 4

chemical freeze-out

the end of inelastic interactions, when the particle species and ratios are frozen

Phys. Rev. C 73(2006) 034905

‘net’ proton dN/dy

AGS

SPS

RHIC 62

RHIC 200

LHC 5500

BRAHMS preliminary

charged particle dN/dy

PHOBOS

extrapolated to LHC

Page 5: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 5

locally thermalcollective expansionradial flow

T eff = T fo +

0.5 m

v 2 thermal freeze-out

the end of elastic interactions, when the momentum spectra are frozen

SPS Pb+PbCentral

RHIC Au+Au Central

RHIC Au+AuPeripheral

Page 6: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 6

AuAu Central charm hadron

AuAu Central , K, p

AuAu Central strangeness hadron

SQM06, Yifei Zhang

nucl-ex/0307024

SQM06, Yifei Zhang

History of

hadron freeze-out

Page 7: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 7

x

z

sideward flow (v1)

x

z

y

Reaction Plane (R.P.)

elliptic azimuthal event anisotropylow pT high pT

particleR.P. (rad)

x

y

elliptic flow (v2)

initial geometryfinal momentum anisotropy

anisotropic flow

dN/d

Page 8: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 8

System size dependence of v2

0.2<pT<1.0 [GeV/c]

Dividing by Npart1/3

: relate this with expansion time

v2 vs. Npart v2/ vs. Npart

v2/ (Au+Au) = v2/ (Cu+Cu)v2/eccentricity is scaled by Npart

1/3 and not dependent on the collision system.

V2//Npart1/3 vs. Npart

PHENIX PRELIMINARY

Systematic errors from eccentricity is not included here.

Maya Shimomurawill talk today!

Hiroshi Masui (also talks today!) will be discussing similar data but in a different way from STAR.

Page 9: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 9

Phys. Rev. Lett. 99, 052301 (2007)

STAR preliminary

QM06

particle identified v2 at RHIC

Number of constituent quark scaling in hadron v2 as well as multi-strange baryon v2: v2 is already established during the quark phase before the hadronization. This seems to be true even for heavy quark like charm.

QM08: A.Dion

Hadron

Page 10: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 10

SQM06, Jin-Hui ChenQuark momentum distribution(from hadron momentum distribution and quark coalescence pictureespecially using early freeze-out multi-strangeness hadrons)

His talk today!

* Similar mT spectra between strange and light quarks, but a slight ”effective mass” dependence which may come from radial flow of partonic stage.

* There seems to be centrality dependence, which maybe different between strange and light quarks. (We should see the build up of patonic collectivity.)

s = (sss) / (ss) compared with s = {(sss)}1/3 and/or s = {(ss)}1/2

* q = (qss) / (ss) (or s from above) compared with q from late freeze out charged hadrons (,K,p) to see the additional radial flow from hadronic stage.

)2/(

)3/(

)2/(

)3/(

T

T

T

T

p

pd

p

ps

φ

φ

=

=

Page 11: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 11

AGS RHIC

common initial source geometry from centrality measurement

final source geometry from HBT measurement

final particle emission anisotropy from v2 measurement

source geometry from HBT (also tells us the history of expansion)

Page 12: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 12

RHIC 200GeV SPS 17GeVRHIC 62GeV

PHENIXnucl-ex/0611019

S.Kniege, ISMD 2007

jet

p p

Au Au

Jet suppression modification with 2-particle correlation

Page 13: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 13

System Size and Beam Energy Dependence of Jet Shape

nucl-ex/0611019

No energy dependence (62 ~ 200GeV)Rapid change between Npart = 0 ~ 100Almost no change above Npart > 100

Page 14: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 14

arXiv:0801.4545

Transverse Momentum (Trigger, Associate) Dependence of Jet Shape

Suppression in both near/away side peak at high pT

Enhancement in near side peak at low pT

Development of away side shoulder at low pT

No pT dependence of shoulder peak position, also in 3-p correlation, both results support mach-cone emission.

Page 15: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 15

p+p, peripheral Au+Au central Au+Au PHENIX QM08

d+Au, 200 GeV STAR QM06

(rad)

RidgeRidge

“jet”

Au+Au, 200 GeV

Page 16: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 16

QM08 PHENIX

Centrality Dependence of Ridge and Shoulder Yield and <pT>

Both ridge and shoulder yields increase linearly with Npart. Similar (flat) centrality dependence on inverse slope parameter for both ridge and shoulder.Jet (p+p) like pT shape is harder than ridge, ridge is harder than shoulder, shoulder is similar to inclusive.

Page 17: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 17

STAR Preliminary

TInclusive ~ TShoulder ~ TRidge < TJet

QM06

QM08

ridge

jet

inclusive

< <

Both ridge and shoulder <pT> are almost independent with centrality and trigger pT selections.It’s just like a bulk matter… suspicious on BG(bulk) subtraction… but this is what we see…

Page 18: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 18

arXiv:0712.3033

Near/Away-side B/M ratio increases in centralAway-side B/M ratios approach inclusive valuesIncompatible with in-vacuum fragmentation

Hadron trigger with identified associate Baryon/Meson --- Mach-cone property ---

Page 19: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 19

Ridge vs. Inclusive

STAR Preliminary

Jet Cone vs. Inclusive

STAR Preliminary

QM08: Bedanga Mohanty

QM08: Paul Sorenson

STAR PreliminaryAu+Au 200 GeV

20-60%

3< pTtrig < 4 GeV/c

pTasso : 1.0- 1.5 GeV/c

sys. error v2{RP}

sys. error v2{4}

20-60%

QM08: Aoqi Feng

Several Ridge properties

Page 20: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 20

yt1

yt2

transverse correlations

yt ~ ln(pt)

0.5

1

2

34

pT (Gev/c)

STAR Preliminary

2-particle correlation without high pT trigger selection

200GeV p+p

hard component

ηΔ

φΔ

soft component

ηΔ

φΔ

Longitudinal Fragmentation (“strings”) 1D Gaussian, US pairsHBT peak at origin, LS pairs

Minijets 2D Gaussian at origin, away-side peak actually cos(φΔ)

J of Phys: Conf 27 (2005) 98

These structures define minijet cor

relations

M. Daugherity, QM08

axial correlations

ηΔ

φΔ

Page 21: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 21

longitudinal fragmentation1D gaussian

HBT, res., e+e-2D exponential

Minijet Peak2D gaussian

Away-side -cos(φ)

ΔηΔφ

Elliptic flowcos(2φΔ)

1.2M minbias 200 GeV Au+Au eventsIncluded all tracks with pT > 0.15 GeV/c, || < 1, full φ

84-93%

28-38%

75-84%

19-28%

65-75% 55-65% 46-55%

9-19% 5-9% 0-5%

M. Daugherity, QM08

STAR Preliminary

Page 22: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 22

Centrality

200 GeV62 GeV

STAR Preliminary STAR Preliminary STAR PreliminaryPeak Amplitude Peak η Width Peak φ Width

HIJING 1.382 default200 GeV, quench off

binary scaling assumptionin Kharzeev and Nardi model

data - fit (except same-side peak)

Shape changes little from peripheral to the transition

83-94% 55-65%

ηΔ width

STAR Preliminary

STAR Preliminary

Large change within ~10%

centrality

46-55%

STAR Preliminary

Smaller change from transition to most central

0-5%

STAR Preliminary

QM08 STARE

xtracted 2-D near-side G

aussian param

eters are shown. T

he strong

width change vs centrality should h

ave a relation to the ridge formatio

n.

longitudinal (densitycorrelation length

Kensuke Homma, tomorrow!

Page 23: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 23

3<pTtrig<4GeV/c & 1.0<pT

asso<1.5GeV/c 20-60%STAR

= associate - trigger (rad)

Jet modification and geometry(and v2)

QM08: STAR, PHENIX

QM04: STAR

Mach-cone shape depends on R.P. angle.Mach-cone is a source of of v2

Page 24: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 24

STAR Preliminary

Rid

ge

Jet

3<pTtrig<4, 1.5<pT

trig<2.0 GeV/c

QM08 STAR

STAR

(rad)

RidgeRidge

“jet”Au+Au, 200 GeVRidge/Cone and

geometry (v2)

Ridge shape depends on R.P. angle.Ridge is a source of of v2

Jet does not depends on itJet reduces v2

Jet

Rid

ge

Shou

lder

(co

ne)

Hea

d (

)Rid

ge

Shou

lder

(co

ne)

v2

v2

Page 25: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 25

(rad)

PYTHIA p+ptrigger

near side

away sidey

x

(1) away side of a back-to-back(b-t-b) jet is wider in than in (2) If there are two parallel b-t-b jets, away side of one b-t-b jet can be

near side of the another b-t-b jet.(3) Suppression as well as modification of b-t-b jet would depend on re

lative angle w.r.t. almond geometry, we know this from v2 measurement and believe this is the major source of v2 at high pT .

(4) Therefore, there should be inter b-t-b jets correlation give by the geometry from (3), this could make near side ridge like effect, especially if the effect (3) has shaper dependence than v2(=cos2x).

(5) We always measure inclusive v2, which includes the effect (3). Therefore any modification which could generates the elliptic anisotropy would be included in the measured v2 .

(6) We subtract BG contribution with this v2 from (5) by maximizing BG contribution assuming zero jet yield at minimum at any d.

(7) If near and away side jets overlap each other, this subtraction underestimates the jet yield and can change the extracted jet shape.

(8) If you extract angular dependence of jet w.r.t. R.P., the results will easily be affected by the choice of v2 from (5).

Page 26: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 26

(1)

(2)

(3)

(4)

(2)

(3)

(4)

(1)

Trigger

particle

x(R.P.) x(R.P.)

yy

(2)Trigger

particle

ASSO.TRIG.

associate particle direction at

same || w.r.t. trigger particle

but with different arrow length

associate particle direction at

same || w.r.t. red dashed line

but with different arrow length

In order to study the jet modification (mach-cone, ridge) and it’s relation with almond geometry in more detail…

with and without R.P. aligned event mixing

Page 27: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 27

Summary

(1) Thermal, chemical freeze-outTch ~ QGP phase boundaryHistory of thermal freeze-out

(2) Radial, elliptic expansionQuark phaseQuark coalescenceHistory of radial, elliptic expansion

(3) Jet suppression, modificationQGP matter propertyrelation between v2 and modificationsubtraction of flow, which includes the modification

jet-jet correlation via reaction plane (part of v2)

Page 28: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 28

R.P.

(1)(2)

(3)

(4)

(5)

(6)(7)

(8)ave (1)~(8)

ave (1),(8) ave (2),(7) ave (3),(6) ave (4),(5)

(1) (2) (3) (4)(8) (7) (6) (5)

Pure Flow Simulationwith trigger angle selection w.r.t. R.P.with/without R.P. aligned event mixing

wit

hout

R.P

. ali

gned

eve

nt m

ixin

gw

ith

R.P

. ali

gned

ev

ent m

ixin

g

(1) (2) (3) (4)(8) (7) (6) (5)

Page 29: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 29

V4V4/(nq)2

M. Issah, QM08

Page 30: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 30

K. Miki, QM08

PHENIX preliminary

Page 31: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 31

STAR Preliminary

(1-2)/2

(1-2)/2

STAR Preliminary

Cone angle (radians)

pT (GeV/c)

jet

p p

Au Au

d+AuCollisions

Au+Au Central 0-12%

3-particle correlation “12 vs 13”

*=

*=

PHENIX Preliminary PHENIX Preliminary

Cone like Jets

Deflected Jets

No pT dependence, too.

Both measurements preferMach-cone scenario.

Page 32: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 32

Away RegionShoulder Region Head RegionShoulder Region

Near Region

A Large BG Subtraction with v2 like Flow Shape

regiondouble peak region

Same Side Far Side

Description of Jet Shapewith Several Key Words

Page 33: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 33

PRL91(2003)0723042<pT

Asso.<pTt 4< pTTrig.< 6 GeV/c

PRL95(2005)1523010.15<pT

Asso.<4 4< pTTrig.< 6

GeV/c

Page 34: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 34

0-20% Au+Au 20-40% 60-92%

Solid points are Au+Au, open points are p+p, red/blue colors show systematic errors.

More central arXiv:0801.4545

Page 35: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 35

p+p vs Au+Au cent 60-92%

Page 36: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 36

p+p vs Au+Au cent 0-20%

Page 37: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 37

arXiv:0801.4545

Page 38: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 38

arXiv:0801.4545

Page 39: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 39

arXiv:0801.4545

Page 40: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 40

Jet + Flow (Raw) Jet (Flow subtracted)

M. P. McCumber, QM08

Page 41: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 41

Page 42: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 42

Page 43: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 43

arXiv:0801.4545

Page 44: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 44

Page 45: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 45

Page 46: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 46

Page 47: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 47

PHENIX preliminary

Identified 0 trigger with associate hadron

Width does not change with centrality similar to charged hadron triggered case.

7-9 (X) 1-20-20%

7-9 (X) 4-50-20%

7-9 (X) 4-520-40%

7-9 (X) 4-540-60%

7-9 (X) 4-560-90%

7-9 (X) 6-840-60%

QM08 PHENIX

Page 48: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 48

Page 49: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 49

1/N

trig

dN

/d

(A.U

.)

pT, photon GeV

Per-

Tri

gg

er

Yie

ld (

A.U

.)

Run 6 p+p @ 200 GeV

0

Run 7 Au+Au @ 200 GeV, cent=0~20%, preliminary

Direct trigger with associate hadronQM08 PHENIX

p+p: C

onsistent with trigger photon carr

ying the full jet energy, away side jets ar

e similar betw

een 0 and

triggers.

Need m

ore studies and statistics for A

u+A

u case.

Run 4/5 p+p/Au+Au @ 200 GeV

Page 50: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 50

84-93%

28-38%

75-84%

19-28%

65-75% 55-65% 46-55%

9-19% 5-9% 0-5%

84-93%

28-38%

75-84%

19-28%

65-75% 55-65% 46-55%

9-19% 5-9% 0-5%

Fit residual = data - model

Fit model

Page 51: ATHIC2008, 14/Oct/2008, Tsukuba, JapanShinIchi Esumi, Univ. of Tsukuba, Japan1 Collective Expansion of QGP ShinIchi Esumi Univ. of Tsukuba, Inst. of Physics

ATHIC2008, 14/Oct/2008, Tsukuba, Japan ShinIchi Esumi, Univ. of Tsukuba, Japan 51