sPHENIX upgrade at mid-rapidity ShinIchi Esumi Inst. of Physics, Univ. of Tsukuba

Future Directions in High Energy QCD, 20/Oct/2011, Riken ShinIchi Esumi, Univ. of Tsukuba 1

sPHENIX upgrade at mid-rapidity

ShinIchi EsumiInst. of Physics, Univ. of Tsukuba

contents :

• Hadrons• Electrons• Photons• Jets

Workshop on :

“Future Directions in High Energy QCD”20-22/Oct/2011Nishina Hall, Riken, Japan

Future Directions in High Energy QCD, 20/Oct/2011, Riken ShinIchi Esumi, Univ. of Tsukuba 2

sPHENIX&

ePHENIX

Future Directions in High Energy QCD, 20/Oct/2011, Riken ShinIchi Esumi, Univ. of Tsukuba 3

PHENIX

Future Directions in High Energy QCD, 20/Oct/2011, Riken ShinIchi Esumi, Univ. of Tsukuba 4

TOF vs 1/p (with ACC veto)

K

pTime of Flight

Aerogel Cherenkov Counter

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Thermal / chemical freeze-out properties from PIDed spectra and ratios

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Partonic and hadronic expansion / collectivity from PIDed v2

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Advanced MRPC

ASICs for fast timing

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FAST mRPC TOF for PID from Mickey Chiu

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Beam Energy Scan Programfrom STAR experiment

net-proton distribution n-quark scaling of v2

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PHENIX

(Amazing) similarity between RHIC and LHC (v2 and RAA)

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PHENIX Preliminary PHENIX Preliminary

Au+Au 200GeVPb+Pb 2.76TeV Au+Au 39GeV

protonproton

Small deviations in (mT-m0)/nq scaled v2

roughly (mT-m0)/nq scaled for all energieslarger pT shift for heavier particlesradial flow increases with energy

M. Krzewicki, QM11

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Geometrical source anisotropy via HBT measurement at the end of freeze-out

T. Niida, WPCF2011, 20/Sep/2011 It might be different from the v2-v4 relation

final

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Ring-Imaging Cherenkov Detector

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Charm suppression and flow from single electrons

Thermal photon spectra from electron-pairs (*)

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Direct photon RAA

Direct photon v2

prompt dominance : no suppression and small v2 at high pT

large v2 for thermal photon from combined real and virtual measurements

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Electron-pair mass spectra in p+p / Au+Au

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Pairs in Central Arms

Pairs matched to HBD

Pairs after HBD rejection

0.65 m

e+

e-

pair

opening angle

B≈0 1.21

mCherenkov blobs

Hadron Blind Detector

Future Directions in High Energy QCD, 20/Oct/2011, Riken ShinIchi Esumi, Univ. of Tsukuba 18

Charged hadrons and jets High pT photons and electrons

Future Directions in High Energy QCD, 20/Oct/2011, Riken ShinIchi Esumi, Univ. of Tsukuba 19

J/Psi RAA and v2

different J/ RAA(pT) dependence between RHIC( ) and LHC( )

Future Directions in High Energy QCD, 20/Oct/2011, Riken ShinIchi Esumi, Univ. of Tsukuba 20

R>0.8R<0.8

Jet energy asymmetry+

Out-of-Cone radiation

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IAA (pTh:2-7GeV/c, pT

:5-12) vs Npart

Fragmentation function with direct photon trigger

Future Directions in High Energy QCD, 20/Oct/2011, Riken ShinIchi Esumi, Univ. of Tsukuba 22

0 (hadron) triggerJet (s

mall R) tr

iggerJet (large R) tr

iggerGamma trigger

Closer and closer to

the initial parton energy

more and more surface bias

given by energy loss

STAR Preliminary

Au+Au 0~10%

,Jet,0 - hadron correlation Comparisons are the most important!

RHIC-AGS’09, Y. S. Lai

QM09, M. Ploskon

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v2 in p+p v3 in A+A

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vn

Higher harmonic event anisotropy and azimuthal correlation

ATLAS Preliminary

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(4) s=[-1,0]/8(5) s=[0,1]/8

PHENIX preliminary

in-planetrigger selection

out-of-planetrigger selection

average

(1)

(2)

(3)

(4)

(5)

(6)

(7)(8)(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

in-plane

Asso. Trig. (rad)

in-plane associate regions

s = Trig. R.P.

[]

(6) s=[1,2]/8

(7) s=[2,3]/8

(8) s=[3,4]/8

(3) s=[-2,-1]/8

(2) s=[-3,-2]/8

(1) s=[-4,-3]/8

200GeV Au+Au -> h-h (run7)(pT

Trig=2~4GeV/c, pTAsso=1~2GeV/c)

mid-central : 20-50%c 2

(dat

a) -

c2(

flow

)

significant

not significant comparedwith systematic errors

strong preference of associate particle emission towards the in-plane direction

Future Directions in High Energy QCD, 20/Oct/2011, Riken ShinIchi Esumi, Univ. of Tsukuba 26

averaged over all trigger angles

cen

tral

(0-2

0%

) m

id-ce

ntra

l(2

0-5

0%

) p

erip

he

ral

(50

-93

%)

the same data in polar plots (R.P. is x axis)--- associate distribution for a given trigger direction ---

R.P.

Trigger angle

in-plane trigger| Trig. - R.P. | < /8

out-of-plane trigger3/8 < | Trig. - R.P. | < /2

PHENIX preliminary

200GeV Au+Au -> h-h(pT

Trig=2~4GeV/c, pTAsso=1~2GeV/c)

base line

R.P.

penetrationsurface

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heavy-flavor (b/c tagged) electronidentified open heavy-flavor mesonmulti-hadron/jet correlations with R.P. / large Trig

higher harmonic event anisotropy

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Summary

Calorimetric detector for jets, electrons and photons at high pT

How about low pT electrons, photons and identified hadrons? What about fluctuation/correlation variables with particle identification using a large acceptance detector…