High pT suppression and v2 from PHENIX
ShinIchi Esumi, Univ. of Tsukuba

Contents• High pT suppression• v2 and higher harmonics• HBT w.r.t. n• Jet correlation w.r.t. nHigh pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

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(Non-) suppression of hadron (direct-photon)
peripheral Au+Au

central Au+Au

arXiv: 1208.2254
arXiv: 1205.5759- strong suppression of hadrons- no suppression of direct photons at high pT

High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

2Thermal photons and their Flowd+Au

arXiv: 1208.1234

arXiv: 1105.4126
Phys. Rev. Lett. 109, 122302 (2012)
PHENIX
QM12

Au+Au

Au+Au

- significant low pT photon excess- comparable v2 with hadrons

High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

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Energy dependenceof hadron suppression
from low RHIC energy
to LHC energy- smaller suppression (orenhancement) at low energy- saturation at high energy

arXiv: 1204.1526

Phys. Rev. Lett.101, 162301 (2008)

High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

4Fractional energy loss
arXiv: 1204.1526
arXiv: 1208.2254

2.76 TeV
200 GeV- continuous increase of energy loss interms of fractional energy loss in pT(coming from slope changes)

High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

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RAA and v2
from RHIC to LHC- no simple solution to describe
RAA and v2 for both RHIC/LHC
simultaneouslyHigh pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

6Phys. Rev. C 85, 064914 (2012)

Deviation fromnCQ scaling at
200GeV Au+Au- consequence of similarv2 at high pT for different
particle species

High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

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PHENIX, QM12Central collisions(193GeV U+U)
at RHIC- larger radial flow
- various geometry tests
on going with Cu+Au,
U+U data from run12.
High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

8PHENIX, QM12

Beam energy
dependence for
identified particle
v2 and v3- similar for allparticle species
High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

9Blast Wave fitting
and nCQ scalingof identified
particle vn
PHENIX, QM12(a) : ~ v2 / nCQ(b) : ~ vn1/n(a)+(b) : ~ vn / nCQn/2- anisotropy in velocity, coordinate- Tf and 0 constrained by spectra

High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

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Azimuthal HBT of , KK

Phys. Rev. Lett. 103
142301 (2009)

2init & pT dependence of 2final--- RT-sideoscill. --- v2(pT) & RHBT(pT)High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

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PHENIX, QM12

RT-side, RT-out ()RT-side, RT-out ()RT-sideoscill. < RT-outoscill. for n=2,3 (central)

High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

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PHENIX, QM12

extracted by BW fittingwith spectra + v2,3,4 of ,K,pextracted from RTsideby  HBTHigh pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

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2-part.  correlation with various flow subtraction (1)PHENIX, QM12

- v3 is largely responsible
for away side “mach-cone”
like shape

High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

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2-part.  correlation with various flow subtraction (2)- but v4{4} matters!
PHENIX, QM12High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

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PHENIX, QM12

mid-central- strong 2 dependence and left/right asymmetry
coupling with geometry and/or expansion- almost no 3 dependence (poor 3 resolution)

High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

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PHENIX, QM12

central- out-of-plane correlation enhanced(strong jet quenching and collective expansion)- some weak 3 dependenceHigh pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

17Summary

High pT physics at LHC, Wuhan, China, 23/Oct/2012• High pT suppression• v2 and higher harmonics• HBT w.r.t. n• Jet correlation w.r.t. nShinIchi Esumi, Univ. of Tsukuba

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arXiv: 1208.2254

High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

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Centrality and pT dependences of vn at 200GeV Au+Au

v3 is comparable to v2 at 0~10%
weak centrality dependence on v3v4{4} ~ 2 x v4{2}High pT physics at LHC, Wuhan, China, 23/Oct/2012

charged particle vn : ||<0.35
reaction plane n : ||=1.0~2.8

All of these are consistent
with initial fluctuation.
ShinIchi Esumi, Univ. of Tsukuba

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Centrality dependences of vn (n) at 200GeV Au+Au
2

3

4

How the initial geometrical anisotropy wastransformed into the final momentum anisotropy?

High pT physics at LHC, Wuhan, China, 23/Oct/2012

Npart.

ShinIchi Esumi, Univ. of Tsukuba

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Small deviations in (mT-m0)/nq scaled v2
Pb+Pb 2.76TeVAu+Au 200GeV

Au+Au 39GeV

40-45%

protonprotonPHENIX Preliminary

PHENIX Preliminary

M. Krzewicki, QM11
J. Phys. G38, (2011) 124047

roughly (mT-m0)/nq scaled for all energies
larger pT shift for heavier particles
radial flow increases with energy
High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

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High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

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High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

24High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

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High pT physics at LHC, Wuhan, China, 23/Oct/2012

ShinIchi Esumi, Univ. of Tsukuba

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