Recent results on Quark Gluon Plasma and Future Plans Contents QGP and heavy ion experiments Thermal...

Recent results on Quark Gluon Plasmaand Future Plans

ContentsQGP and heavy ion experimentsThermal and collective bulk (soft) measurementsJet and correlation (hard) measurementsInterplay between hard and soft probesFuture plans

ShinIchi EsumiInst. of Physics, Univ. of Tsukuba

Beihang-Tsukuba Collaboration Meeting, 10-11/Nov/2013, Tsukuba ShinIchi Esumi, Univ. of Tsukuba 1

HadronsQuark Gluon Plasma

Quark Gluon Plasma (QGP)


Phase-Diagram of QGP

1st order phase transition ?


Heavy Ion collisions at Ultra-relativistic energy


Relativistic Heavy-Ion Collider (RHIC) at BNL in New YorkLarge Hadron Collider (LHC) at CERN in Geneva

LHC

RHIC


STAR

PHENIXCMS

ATLAS

ALICE


CMS

STAR

PHENIX

ALICE


single particle pT spectra,HBT measurements

- Thermal freeze-out- Tfo

(Th) ~ 100MeV- end of elastic interaction among hadrons- local thermalization- Radial expansion, flow

particle yield and ratio

- Chemical freeze-out- Tfo

(Ch) ~ 170MeV- end of inelastic interaction among hadrons- close to the expected phase boundary

Chemical and Thermal Freeze-out


Thermal Photon Radiation and Collective Flow

Phys. Rev. Lett. 104 (2010) 132301

- significant low pT photon excess with much higher temperature than Tf

- comparable v2 with hadronselliptic expansion

Phys. Rev. Lett. 109 (2012) 122302


Initial Fluctuation and Higher Order Collective Flow

PHENIX Preliminary, QM12

WMAP

2nd orderElliptic

3rd orderTriangular

4th order 4th orderw.r.t. F2


PHENIX Preliminary, QM12

Geometrical Size and Shape at Freeze-out via Quantum Interferometry

(multi-dimensional HBT) measurement pT1

pT2

side view sizeqT-side : RT-side

depth + time durationqT-out : RT-out

together with vn(pT)PID

fitting with Blast Wave

RT-side & RT-out vs () and ()RT-side

oscill. < RT-outoscill.

for n=2,3 (central)


Strong B-field and Local Parity Violation in QGPCharge Asymmetry Signal

L or B

X

Y

dN/d ~ 1+ 2vncos(n(-)) + 2asin(-) + …

<cos(1+2-2)> ~ -<a1a2>

＋

＋

Strong B-field


jet

p p

Au Au

Energy Loss of Parton in QGP 　　　 --- jet quenching ---

Phys. Rev. Lett. 91 (2003) 072304

CMS

Phys. Rev. Lett. 105 (2010) 252303

Away-side suppression

di-jet energy asymmetry

re-distrib

ution of

the lost

energy

di-jet relative angle

|E1-E2| E1+E2

|f1-f2|


g

hadrons

-Hadron Correlation--- golden probe for jet-quenching ---

Phys. Rev. Lett. 111 (2013) 32301

Phys. Rev. Lett. 109 (2012) 152302


High mult. p+A A+AHigh mult. p+pMin. bias p+p

High-temperature, High-density system might be created even in small system at high multiplicity event. --- collective expansion--- centrality/multiplicity dependence

Ridge Structure (vn) in Small System

CMSJHEP 09 (2010) 091, Eur. Phys. J. C 72 (2012) 2012 Phys. Lett. B 718 (2013) 795-814


Evolution of Near-Side Correlation Shape

- strong 2 dependence and left/right asymmetry (coupled with energy loss and collective flow)- broader out-of-plane correlation than in-plane correlation (re-distribution of lost energy)- some weak 3 dependence

Angular Dependence of Jet Shape --- hard-soft interplay ---

PHENIX Preliminary, QM12Au+Au 200GeV, hadron-hadron, mid-central 40-50% pT : (2~4)Trig x (1~2)Asso (GeV/c), vn subtraction, no Dh cut Df = fAsso – fTrig

2

pp

3


Jet Fragmentation (multi-particle correlation) and Di-jet Analysis with respect to Bulk Geometry and/or Collectivity

with respect toElliptic plane F2

with respect toTriangular plane F3

with respect toLongitudinal angle h

--- effects on the jet (hard) probes (jet suppression, modification)--- effects on the bulk (soft) probes (re-distribution, re-heating)


FAIR at GSI(Darmstadt, Germany)

J-PARC at JAEA/KEK for heavy-ion collisions(Tokai, Japan)

sPHENIX at RHIC-BNL(New York, USA)

ALICE at LHC-CERN for Luminosity upgrade(Geneva, Switzerland)

Di-jet calorimeterForward calorimeterHigh-speed read-out


Summary

QGP and heavy ion experimentsThermal and collective bulk (soft) measurementsJet and correlation (hard) measurementsInterplay between hard and soft probesFuture plans


Ridge Structure (vn) in d+Au at RHIC

Backward-Central or Forward-Central

Two-particle correlations

arXiv :1303.1794


beam

Dh = hAsso - hTrig-4 -2 0 2 4

1/N

Trig d

NAs

so /

dDh

Forward-backwardasymmetry is visiblein AMPT simulation.Near side Dh peak is backward shifted w.r.t. trigger h direction.

hTrig ~ -1

Forward-Backward Asymmetry in Dh

Shape with respect to Trigger h

　 (associate yield per trigger

with AMPT simulation)

AMPT mid-central bimp = 4 - 10 fm

AMPT Peripheral bimp = 10 - fm

| | <Df /4 p near side| | >Df /4 p away side

hTrigger

-1.5 1.50.0


0 (hadron) triggerJet (small R) tri

ggerJet (la

rge R) triggerGamma trig

gerCloser and closer to

the initial parton energy

more and more surface bias

given by energy loss

Multi-particle correlation like 2+1 particle correlation analysis (Trig1, Trig2, Asso) can be used as largely modified jet and di-jet signal.

Use photons, Jets, single hadrons as trigger in order to look at correlated association emission

Trig1

Trig2

Asso

Trig1

Trig2

Asso

Trig1

Trig2 Asso

Use “Trig2 relative to Trig1”as jet trigger condition, and look at distribution : “Associate relative to Trig1”without jet-reconstruction bias

To be used for Fn and hTrig dependent analysis


Recent results on Quark Gluon Plasma and Future Plans Contents QGP and heavy ion experiments Thermal...

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