The SpaceTime Puzzle at RHIC Instead of slowly

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The Space-Time Puzzle at RHIC ·Instead of slowly burning QGP Log Dt~R/vdef >>R ·Evidence

The Space-Time Puzzle at RHIC ·Instead of slowly burning QGP Log Dt~R/vdef >>R ·Evidence for Sudden freezeout Dt << R ! ·Amazingly independent of 1< KEcm< 100 AGe. V ·Yet there is Huge v 2~0. 15 out to 6 Ge. V, transverse flow , hadro equilibration, pbar > pi-, … 1/6/02 1

AGS-SPS-RHIC Pion Interferometry • Central Au. Au (Pb. Pb) • Why saturation? STAR Preliminary

AGS-SPS-RHIC Pion Interferometry • Central Au. Au (Pb. Pb) • Why saturation? STAR Preliminary is X-Axis Z- Ax Beam Axis P 1 K P 2 q ce ur So Y-Axis • Why no rise in space or temporal homogeneity? 1/6/02 2

Amazingly Weak Energy dependence M. Lisa et al. , PRL 84, 2798 (2000) R.

Amazingly Weak Energy dependence M. Lisa et al. , PRL 84, 2798 (2000) R. Soltz et al. , to be sub PRC C. Adler et al. , PRL 87, 082301 I. G. Bearden et al. , EJP C 18, 317 (2000) p- • Rout and Rside are energy independent within error bars. • Smooth energy dependence in Rlong • No immediate indication of very different physics • Fit Rlong to: • AGS: A = 2. 19 +/-. 05 • SPS: A = 2. 90 +/-. 10 • RHIC: A = 3. 32 +/-. 03 1/6/02 3

HBT radii at 2 AGe. V M. Lisa 1/6/02 4

HBT radii at 2 AGe. V M. Lisa 1/6/02 4

Images of p--emitting sources (scaled ~ x 1014) y similar to naïve overlap: b~5

Images of p--emitting sources (scaled ~ x 1014) y similar to naïve overlap: b~5 fm x’ z q. S=47° x’ x’ 2 AGe. V 3 fm y y 4 AGe. V z 6 AGe. V q. S=37° z q. S=33° Large, positive tilt angles 1/6/02 x x 5 x

PHENIX and STAR at RHIC Hydro+Ur. QMD Soff, Bass, Dumitru (PRL 86) Amazing! 1/6/02

PHENIX and STAR at RHIC Hydro+Ur. QMD Soff, Bass, Dumitru (PRL 86) Amazing! 1/6/02 6

Rout/Rside vs. k. T at AGS 1/6/02 7

Rout/Rside vs. k. T at AGS 1/6/02 7

Why we expected more Rout>>Rside ? t Deflagration (Q->H Burn Front) vdef~d. H/4 d.

Why we expected more Rout>>Rside ? t Deflagration (Q->H Burn Front) vdef~d. H/4 d. Q Hadron Gas IFF Combustion Theory Van Hove (83) GKMS (84) QGP Dt~R/vdef x Qout PION INTERFEROMETRY OF QUARK - GLUON PLASMA. By S. Pratt (Minnesota U. ). 1986. Qside Published in Phys. Rev. D 33: 1314 -1327, 1986 PION INTERFEROMETRY IN ULTRARELATIVISTIC HEAVY ION COLLISIONS. G. Bertsch, M. Gong, M. Tohyama, Phys. Rev. C 37: 1896 -1900, 1988. 1/6/02 8

QGP EOS Continuous Cross Over vs First Order Bag Model Equation of State 1/6/02

QGP EOS Continuous Cross Over vs First Order Bag Model Equation of State 1/6/02 D. Rischke , MG, NPA 613(97)397 9

e 0=20 Ge. V/fm 3 evolved with hydro The QGP Stall DT=0 QGP P=e/3

e 0=20 Ge. V/fm 3 evolved with hydro The QGP Stall DT=0 QGP P=e/3 t~R Stall D. Rischke, MG NPA 613(97)397 1/6/02 10

Pratt-Bertsch Cpp(qside, qout) Side DT/Tc=0. 1 P=e/3 qside Out qout 1/6/02 D. Rischke, MG,

Pratt-Bertsch Cpp(qside, qout) Side DT/Tc=0. 1 P=e/3 qside Out qout 1/6/02 D. Rischke, MG, NPA 613(97)397 11

pp Rout/Rside QGP-> Pions QGP->Resonances DT=0 P=e/3 DT=Tc/10 1/6/02 D. Rischke, MG NPA 613(97)397

pp Rout/Rside QGP-> Pions QGP->Resonances DT=0 P=e/3 DT=Tc/10 1/6/02 D. Rischke, MG NPA 613(97)397 12

Effect of Rapid Thermalization QGP-> Pions QGP->Resonances Tf=Tc NULL Solutions!! 1/6/02 13

Effect of Rapid Thermalization QGP-> Pions QGP->Resonances Tf=Tc NULL Solutions!! 1/6/02 13

Dissipative Hadronic FSI distort pion lenses Soff, Bass, Dumitru nucl-th/0012085 • long-lived dissipative hadronic

Dissipative Hadronic FSI distort pion lenses Soff, Bass, Dumitru nucl-th/0012085 • long-lived dissipative hadronic phase dominates correlation signal Ø dissipative hadronic phase: unavoidable consequence of thermalized QGP IF strong incoherent resonance dynamics applies 1/6/02 14

B. R. Schlei (QM 99) nucl-th/9904067 1/6/02 Predicted 15

B. R. Schlei (QM 99) nucl-th/9904067 1/6/02 Predicted 15

The Thorn in Hydro’s side 1/6/02 See D. Teany, E. Shuryak 16

The Thorn in Hydro’s side 1/6/02 See D. Teany, E. Shuryak 16

Useful cartoon showing why HBT in AA is not easy to unfold P. Kolb,

Useful cartoon showing why HBT in AA is not easy to unfold P. Kolb, U. Heinz MANY 8 D xm-pn correlated geometries give same HBT radii 1/6/02 17

P. Kolb, U. Heinz Hydro (x, y, t, K) Correlated Geometries 1/6/02 18

P. Kolb, U. Heinz Hydro (x, y, t, K) Correlated Geometries 1/6/02 18

Denes Molnar’s Parton Cascade Diffuse correlated geometries Rside Rout xside Rlong xout 1/6/02 Rout<Rside

Denes Molnar’s Parton Cascade Diffuse correlated geometries Rside Rout xside Rlong xout 1/6/02 Rout<Rside is possible 19

Fits 1/6/02 are NOT explanations but convenient summary of data 20

Fits 1/6/02 are NOT explanations but convenient summary of data 20

Are Systematic Experimental Errors Under Control? Corrections P. Filip ? ? 1/6/02 21

Are Systematic Experimental Errors Under Control? Corrections P. Filip ? ? 1/6/02 21

More work on Coulomb correction needed Better to show Uncorrected data and compare to

More work on Coulomb correction needed Better to show Uncorrected data and compare to corrected theory ! P. Filip 1/6/02 22

Systematic Theory HBT Errors p Wigner Wavepacket x Classical Transport Theory 1/6/02 See also

Systematic Theory HBT Errors p Wigner Wavepacket x Classical Transport Theory 1/6/02 See also S. Pratt … Padula, Gavin MG NPB 329 (90) 357 23

Given D. Teany, E. Shuryak 1/6/02 Hydrodynamic HBT is surprisingly good agreement with Rout,

Given D. Teany, E. Shuryak 1/6/02 Hydrodynamic HBT is surprisingly good agreement with Rout, side ! However, Rlong is tooo longg! 24

New Attemps at sudden hadronization: Non-equilib Polyakov V(L) L(A) But does this really solve

New Attemps at sudden hadronization: Non-equilib Polyakov V(L) L(A) But does this really solve Rlong Is short? U. Heinz Is it consistent with small e-b-e fluctuations? 1/6/02 25

Closing Remarks: (Sorry no time for Event-by-Event fluct) • RHIC HBT has posed a

Closing Remarks: (Sorry no time for Event-by-Event fluct) • RHIC HBT has posed a serious thorn in theory side • V 2, flow, hadron ratios are consistent with EULER hydro up to p. T~2 Ge. V, but hydro fails at AGS, SPS Yet HBT pattern is ~uniform in energy • High pt>2 Ge. V tails reveal jet quenching through very dense opaque matter • Yet hadronization is of short duration (only marginally consistent with hydro Rout, side) • Bjorken flow seems dead with short Rlong! Is Landau resurrecting? • Are we on wrong hydro/transport track? Non-equilib classical fields? Inhomogeneous turbulence? 1/6/02 • Also need to go back to basics and review HBT assumptions 26

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