Gyulassy

1CIPANP’03

Session 3 (Wednesday May 21, 1:40 - 3:20 pm):Probes of Dense Gluonic Matter (part II)

Jet Quenching and Energy Loss - Miklos Gyulassy

CIPANP Relativistic Heavy Ion (RHI) Parallel Session

Gyulassy

2CIPANP’03

G.Baym,QM02

The QGP Paradigm

Proc. Quark Matter 1981-2002

Gyulassy

3CIPANP’03

Ln 1/x

cx (y,A)

The CGC Paradigm

Iancu, Venugopalan hep-ph/0303204

Gyulassy

4CIPANP’03

Systematic Errors not shown

Phobos Preliminary

pT Distribution of Charged Particles

G.Roland

How can we use this tiny pQCD tail to wag the QGP Bulk?

Bulk

Tail

Gyulassy

5CIPANP’03

Au-Au nucl-ex/0304022

The high pT window at RHIC is now wide open

p+p-> hep-ex/0304038 STAR PRL 89, 202301

nucl-ex/0305015

Gyulassy

6CIPANP’03

Jet Tomography of QCD Matter

Single Hadron Tomography

g

g

jet

g

TT

Di-Hadron Tomography

g

gX X

XL1

L2

g

T2J et T

pGLV L

3s n d r( )C CE ,

g

21 dNR dypL( )f

Ivan Vitev, Peter Levai, Xin-Nian Wang, MGReviewed in nucl-th/0302077

Gyulassy

7CIPANP’03

pp

AuAubinaryAuAuAA Yield

NYieldR

/

2/pp

AuAupartAuAupartAA Yield

NYieldR

/

Final submitted to PRL

RAA: High pT Suppression Au-Au 200 GeV:s

Au-Au nucl-ex/0304022

Au-Au nucl-ex/0304022

M. G. Perdekamp, RHIC/AGS May 15,2003

Gyulassy

8CIPANP’03

( )kT

shadAB a/A b c c/B b /adN P DEf d )f (

D®p ® p= Ä Ä ÄDs Ä

I.Vitev et alpQCD tomography

GRVEKSBKKGLV

Gyulassy

9CIPANP’03

Single Hadron Tomography from SPS, RHIC, LHC

1. Cronin dominates at SPS

2. Cronin+Quench+Shadow conspire to give ~ flat R~Npart/Nbin at RHIC dNg/dy ~ 1000 -> g ~100 0

3. Predicts sub Npart quench, positive pT slope of R at LHC and RLHC(40)~RRHIC(40)

Ivan Vitev and MG, Phys.Rev.Lett. 89 (2002)

Gyulassy

10CIPANP’03

Mono Jets from STAR at RHIC(STAR, PRL 90, 082302(2002))

Di-Jets from p + p at 200 GeVDi-Jets from p + p at 200 GeV ‘‘Mono-Jets’ from Au + Au at 200 GeVMono-Jets’ from Au + Au at 200 GeV

STAR, AGS Users Meeting May 15, 2003

● Au+Au p + p

Gyulassy

11CIPANP’03

Suppression and correlationSTAR: 200 GeV Au+Au / p+p

Hadron suppression and disappearance of back-to-back ‘jet’ are correlated!STAR PRL 90, 082302

● Au+Au p + p

STAR Preliminary

STAR, AGS Users Meeting May 15, 2003

Gyulassy

12CIPANP’03

Centrality Dependence of Quenching PHENIX AuAu 200: nucl-ex/0304022

g 2/3GLV part2d r( )

dNRE , NR dy

ConsistentWith GLVFormalism

Gyulassy

13CIPANP’03

So What Do the new d+Au data say?

Which paradigm is closer to reality inThe RHIC x>0.01 domain?

Gyulassy

14CIPANP’03

Jet Quenching

XN Wang, MG

Gluon Shadow

BRAHMSPRL88(02)

Soft Lund strings

Mini-jets

Cronin?

Need pA (or dA) to eliminate jet quenching

Gyulassy

15CIPANP’03

Unquenched Predictions for for d+Au

X.N.Wang, nucl-th/0303004

A.Accardi et al.

pQCD partonic level Glauber-Gribov

P.Levai et al.

XNWang, PRC61(00)064910

Gyulassy

16CIPANP’03

Our NULL Quenching Prediction for dA for x>0.01 is confirmed ! AA quench must be final state interactions

PHENIX Preliminary

1 errors

PHOBOS Preliminary

STAR Preliminary

Gyulassy-16CIPANP 5/21/03

Gyulassy

17CIPANP’03

The NULL Quenching Prediction for dA (for x>0.01) is confirmed !

PHOBOS Preliminary

STAR Preliminary

CIPANP 5/21/03

D+Au Preliminary

Au+Au Final

AA quench must be due to final state interactions: Jet Quenching

Gyulassy

18CIPANP’03

0 RAA Predictions vs Experiment for central Au+Au and d+Au collisions

d+Au: I. Vitev, nucl-th/0302002 and private communication. Au+Au: I. Vitev and M. Gyulassy, Phys.Rev.Lett.89:252301,2002; hep-ph/0208108; M. Gyulassy, P. Levai and I. Vitev, Nucl. Phys. B 594, p. 371 (2001).

PHENIX Preliminary

Run 2002/2003 d-Au 200 GeV: PRELIMINARYs

shadowing

anti-shadowing

Gyulassy

19CIPANP’03

d+Au: two-particle correlations

• no normalization to underlying event

• “central”: top 20% FTPCE multiplicity

• underlying event grows: p+p d+Au minbias d+Au central• near-side: correlation strength and width similar• away-side: d+Au peak broadens but little centrality dependence

Unquenched back-to-back jets are observed in central d+Au!From P. Jacobs for STAR

Check mate!

The NULL dA Quench prediction is seen in fullstrength back-to-backCorrelations as in p+p

Gyulassy

20CIPANP’03

Systematic Errors not shown

Phobos Preliminary

Does the pQCD tail wag the QGP dog?

G.Roland

TailBULK

Yes it does!

Gyulassy

21CIPANP’03

• d+Au was the critical NULL quench control experiment • Au Au RHIC data are now only consistent with

QGP Paradigm!• Jet quenching IS due to final state

interactions in an opaque QGP

• Bulk Elliptic flow pT< 2 GeV saturates hydrodynamic limit for first

time

•V2(pt; h) is consistent with lattice QCD equation of state

Conclusions: After the first 3000 man-years at RHIC

0g Nuke2

1000 30Ræ öt ÷çr r÷ç ÷çè øt p t: :

More good NEWS:

Gyulassy

22CIPANP’03

Collective Flow of Bulk QCD matter?{ }T u u ( (T) P(T)) g P(T) 0mn m n mn

m m¶ =¶ e + - =

Initial spatial anisotropy

Final momentum anisotropy

px

py

x

y

T (x) 0mnm¶ =

P.Kolb et al, D.Teany et al

The most sensitiveBarometric probe of the QCD Equation of State P(T)

Mh dependent v2(pT)

Gyulassy

23CIPANP’03

Experimental To Do List

•Y=+- 3 dAu to test if x=0.001 QGP->CGC ?

•C2(phi1,phi2, pt1,pt2, eta1,eta2, fl1,fl2, Mult, A,B, Ecm)

•Heavy Quark tomography [ Magdalena Djordjevic]

•Open Charm (enhancement?); J/Psi (suppression?)• Charm Flow? [ Sotiria Batsouli ]

•Need Direct Photons thermometer• and tagged direct photon -quark jets!

•Excitation function Ecm~50-100, A=20-100

Gyulassy

24CIPANP’03

Theory To Do List

•HBT source Ecm invariance?• why No time-delay?

•ET/N Ecm invariance, Npart invariance?

•NEW** V2(pT) Ecm invariance !?• source of Flat High pt saturation

•V2(y) NON Bjorken boost invariant

• Baryon transport dynamics

•Thermalization, QGP Transport theory

Gyulassy

25CIPANP’03

Selected References on Jet Quenching

JET QUENCHING AND RADIATIVE ENERGY LOSS IN DENSE NUCLEAR MATTER.By Miklos Gyulassy (Columbia U.), Ivan Vitev (Iowa State U.), Xin-Nian Wang (LBL, Berkeley), Ben-Wei Zhang (Hua-Zhong Normal U.). Feb 2003. 69pp. Published in Quark Gluon Plasma 3, editors: R.C. Hwa and X.N. Wang, World Scientific, Singapore. e-Print Archive: nucl-th/0302077

HIGH P(T) TOMOGRAPHY OF D + AU AND AU+AU AT SPS, RHIC, AND LHC.By Ivan Vitev (Columbia U. & Iowa State U.), Miklos Gyulassy (Columbia U.). Sep 2002. 4pp. Published in Phys.Rev.Lett.89:252301,2002 e-Print Archive: hep-ph/0209161

JET TOMOGRAPHY OF AU+AU REACTIONS INCLUDING MULTIGLUON FLUCTUATIONS. By M. Gyulassy (Columbia U.), P. Levai (Budapest, RMKI), I. Vitev (Columbia U.). Dec 2001. 6pp. Published in Phys.Lett.B538:282-288,2002 e-Print Archive: nucl-th/0112071

HIGH P(T) AZIMUTHAL ASYMMETRY IN NONCENTRAL A+A AT RHIC.By M. Gyulassy (Columbia U. & LBL, Berkeley), I. Vitev (Columbia U.), X.N. Wang (LBL, Berkeley). Dec 2000. 4pp. Published in Phys.Rev.Lett.86:2537-2540,2001 e-Print Archive: nucl-th/0012092 REACTION OPERATOR APPROACH TO NONABELIAN ENERGY LOSS.By M. Gyulassy (Columbia U.), P. Levai (Columbia U. & Budapest, RMKI), I. Vitev (Columbia U.). CU-TP-979, Jun 2000. 39pp. Published in Nucl.Phys.B594:371-419,2001 e-Print Archive: nucl-th/0006010

NONABELIAN ENERGY LOSS AT FINITE OPACITY.By M. Gyulassy (Columbia U.), P. Levai (Columbia U. & Budapest, RMKI), I. Vitev (Columbia U.). CU-TP-976, May 2000. 4pp. Published in Phys.Rev.Lett.85:5535-5538,2000 e-Print Archive: nucl-th/0005032

See also refs therein