1. Experimental Studies of Quark Gluon Plasma at RHIC
ShinIchi Esumi Inst. of Physics, Univ. of Tsukuba
Collective expansion of QGP
Enegy loss of partons in QGP
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

2. ShinIchi Esumi, Univ. of Tsukuba
QGP
Hadron
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

3. ShinIchi Esumi, Univ. of Tsukuba
RHIC(200GeV)
LHC(5500GeV)
SPS (17GeV)
AGS (4GeV)
BNL
CERN
STAR experiment
ALICE experiment
PHENIX experiment
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

4. ShinIchi Esumi, Univ. of Tsukuba
Chemical freeze-out
the end of inelastic interactions, when the particle species and ratios are frozen
Phys. Rev. C 73(2006)
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

5. ShinIchi Esumi, Univ. of Tsukuba
Thermal freeze-out
the end of elastic interactions, when the momentum spectra are frozen
Teff = Tfo m v  2
locally thermal
SPS Pb+Pb
Central
RHIC Au+Au
Peripheral
RHIC Au+Au
Central
collective expansion
radial flow
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

6. ShinIchi Esumi, Univ. of Tsukuba
SQM06, Yifei Zhang
nucl-ex/
AuAu Central charm hadron
AuAu Central , K, p
AuAu Central strangeness hadron
SQM06, Yifei Zhang
History of
hadron freeze-out
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

7. elliptic azimuthal event anisotropy
Anisotropic flow x z y
Reaction Plane (R.P.) x z
sideward flow (v1) x y
elliptic flow (v2)
initial geometry final momentum anisotropy
elliptic azimuthal event anisotropy
low pT high pT
fparticle-FR.P. (rad)
-p p
dN/df
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

8. ShinIchi Esumi, Univ. of Tsukuba
Phys. Rev. Lett. 99, (2007)
Partonic collectivity
--- particle identified v2 ---
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.
Hadron
QM08: A.Dion
QM06
STAR preliminary
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

9. ShinIchi Esumi, Univ. of Tsukuba
Quark momentum distribution
--- extracted from multi-strange hadron ratio ---
arXiv: [nucl-th]
Hadron
d-quark
d-quark
s-quark
s-quark
Collective radial expansion
during the partonic phase
before the hadronic phase
Quark coalescence or
recombination mechanism
for the hadronization
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

10. ShinIchi Esumi, Univ. of Tsukuba
Source geometry --- quantum interferometry via HBT correlation ---
common initial
source geometry from
centrality measurement
AGS
RHIC
final source geometry
from HBT measurement
final particle emission
anisotropy from
v2 measurement
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

11. ShinIchi Esumi, Univ. of Tsukuba
Jet quenching
--- energy loss of parton in QGP ---
No energy loss for g‘s
Energy loss for quark and gluon jets (similar even for heavy quark) v2
RAA
PHENIX preliminary
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

12. ShinIchi Esumi, Univ. of Tsukuba
Jet modification
--- at pT = 1~4 GeV/c ---
jet p Au
Back-to-back jet suppression
--- 2 particle  correlation ---
Leading
hadrons
Medium
jet p
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

13. ShinIchi Esumi, Univ. of Tsukuba
h-h correlation at “p+p 200GeV” vs “Au+Au 200GeV central 0-20%”
associate pT window
Phys. Rev. C 78, (2008)
trigger pT window
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

14. ShinIchi Esumi, Univ. of Tsukuba
Reaction plane dependent energy loss --- a dominant source of v2 at high pT ---
QM09, C. H. Chen
in-plane out-of-plane
near-side
in-plane
in-plane out-of-plane
away-side
out-of-plane
QM04: STAR
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

15. ShinIchi Esumi, Univ. of Tsukuba
200GeV Au+Au -> h-h (run7)
(pTTrig=2~4GeV/c, pTAsso=1~2GeV/c)
mid-central : 20-50%
QM09: PHENIX
(4) s=[-1,0]/8
(5) s=[0,1]/8
in-plane
trigger selection
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
in-plane
(3) s=[-2,-1]/8
(6) s=[1,2]/8
in-plane
associate
regions
c2(data) - c2(flow)
(2) s=[-3,-2]/8
(7) s=[2,3]/8
s = Trig. R.P.
[]
strong preference of associate particle emission towards the in-plane direction
(1) s=[-4,-3]/8
(8) s=[3,4]/8
out-of-plane
trigger selection
average
PHENIX preliminary
Asso. Trig. (rad)
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

16. p+p jet+jet (STAR@RHIC)
Au+Au ???
p+p jet+jet
nucleon
parton
jet
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

17. ShinIchi Esumi, Univ. of Tsukuba
,Jet,0 - hadron
correlation
Comparisons are
the most important!
RHIC-AGS’09, Y. S. Lai
Closer and closer to
the initial parton energy
Gamma trigger
Jet (large R) trigger
Jet (small R) trigger
0(hadron) trigger
more and more surface bias
given by energy loss
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

18. Back-to-back Jet Calorimeter for LHC-ALICE experiment
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

19. ShinIchi Esumi, Univ. of Tsukuba
-Triggered Away-side Correlations: Jet Fragmentation Function in p+p and Au+Au
QM09 PHENIX
Fit effective FF’s with
p+p: b = 6.89 ± 0.64
Au+Au: b = 9.49 ±1.37
Difference reflects influence of the medium
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

20. ShinIchi Esumi, Univ. of Tsukuba
Tch TC
dNch/dh
200
400
600
<b>
Thermal photon radiation
Tinit
Tkin
PHENIX, arXiv: v1 [nucl-ex]
Slope parameter (0-20%): T = (221 ± 23 ± 18) MeV
Various Hydro models:
TInitial = 300~600 MeV
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

21. ShinIchi Esumi, Univ. of Tsukuba
Summary
* History of chemical/thermal freeze-out
* Radial and elliptic collective expansions
--- in partonic and hadronic stages
* Jet quenching via parton energy loss
--- suppression and re-distribution
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

22. ShinIchi Esumi, Univ. of Tsukuba
J/ suppression
Centrality
(Npart)
RAA
cold nuclear
matter effect
cold nuclear
matter effect
Au+Au
mid-rapidity
Au+Au
forward-rapidity
SPS-like suppression
+ regeneration
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

23. ShinIchi Esumi, Univ. of Tsukuba
Dq*=p
Df*=0
PHENIX Preliminary
Cone like Jets
Deflected Jets
jet p Au
3-particle correlation “Df12 vs Df13”
d+Au
Collisions
Both measurements prefer
Mach-cone scenario.
(1-2)/2
Au+Au
Central 0-12%
Cone angle (radians)
No pT dependence, too.
STAR Preliminary
(1-2)/2
pT (GeV/c)
STAR Preliminary
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba

24. ShinIchi Esumi, Univ. of Tsukuba
SQM09, F. Wang
The 7th Japan-China Joint Nuclear Physics Symposium, 11/Nov/2009
ShinIchi Esumi, Univ. of Tsukuba