ShinIchi Esumi for the PHENIX collaboration Inst. of Physics, Univ. of Tsukuba, Japan

SQM08 Tsinghua Univ., Beijing, China, 9/Oct/2008 Univ. of Tsukuba, ShinIchi Esumi 1

Two-Particle Azimuthal Correlation of Identified Particle in High-Energy Heavy-Ion Collisions at RHIC-PHENIX

ShinIchi Esumi for the PHENIX collaborationInst. of Physics, Univ. of Tsukuba, Japan

Contents•Jet-Suppression and Modification•Mach-cone and Ridge•Identified Particle Correlation•Correlation w.r.t. Reaction Plane


Au + Au

Use Jet as a probe of High-Energy and Density Matter Jet in p+p, d+Au or Peripheral Au+Au Collision as a Base Line Subtraction of Non-Correlated BG in Central Heavy-Ion Collisions

p + p Au + Aud + Au


RHIC 200GeV SPS 17GeVRHIC 62GeV

PHENIXnucl-ex/0611019

S.Kniege, ISMD 2007

jet

p p

Au Au

Jet suppression modification with 2-particle correlation


arXiv:0801.4545

Transverse Momentum (Trigger, Associate) Dependence of Jet Shape

Suppression in both near/away side peak at high pT

Enhancement in near side peak at low pT

Development of away side shoulder at low pT

No pT dependence of shoulder peak position


STAR Preliminary

(1-2)/2

(1-2)/2

STAR Preliminary

Cone angle (radians)

pT (GeV/c)

jet

p p

Au Au

d+AuCollisions

Au+Au Central 0-12%

3-particle correlation “12 vs 13”

*=

*=

PHENIX Preliminary PHENIX Preliminary

Cone like Jets

Deflected Jets

No pT dependence, too.

Both measurements preferMach-cone scenario.


p+p, peripheral Au+Au central Au+Au PHENIX QM08

d+Au, 200 GeV STAR QM06

(rad)

RidgeRidge

“jet”

Au+Au, 200 GeV


QM08 PHENIX

Centrality Dependence of Ridge and Shoulder Yield and <pT>

Both ridge and shoulder yields increase linearly with Npart. Similar (flat) centrality dependence on inverse slope parameter for both ridge and shoulder.Jet (p+p) like pT shape is harder than ridge, ridge is harder than shoulder, shoulder is similar to inclusive.


STAR Preliminary

TInclusive ~ TShoulder ~ TRidge < TJet

QM06

QM08

ridge

jet

inclusive

< <

Both ridge and shoulder <pT> are almost independent with centrality and trigger pT selections.It’s just like a bulk matter… suspicious on BG(bulk) subtraction… but this is what we see…


Centrality

200 GeV62 GeV

STAR Preliminary STAR Preliminary STAR PreliminaryPeak Amplitude Peak η Width Peak φ Width

HIJING 1.382 default200 GeV, quench off

binary scaling assumptionin Kharzeev and Nardi model

data - fit (except same-side peak)

Shape changes little from peripheral to the transition

83-94% 55-65%

ηΔ width

STAR Preliminary

STAR Preliminary

Large change within ~10%

centrality

46-55%

STAR Preliminary

Smaller change from transition to most central

0-5%

STAR Preliminary

QM08 STARE

xtracted 2-D near-side G

aussian param

eters are shown. T

he strong

width change vs centrality should h

ave a relation to the ridge formatio

n.

longitudinal (densitycorrelation length


arXiv:0712.3033

Near/Away-side B/M ratio increases in centralAway-side B/M ratios approach inclusive valuesIncompatible with in-vacuum fragmentation

Hadron trigger with identified associate Baryon/Meson


PHENIX preliminary

Identified 0 trigger with associate hadron

Width does not change with centrality similar to charged hadron triggered case.

7-9 (X) 1-20-20%

7-9 (X) 4-50-20%

7-9 (X) 4-520-40%

7-9 (X) 4-540-60%

7-9 (X) 4-560-90%

7-9 (X) 6-840-60%

QM08 PHENIX


1/N

trig

dN

/d

(A.U

.)

pT, photon GeV

Per-

Tri

gg

er

Yie

ld (

A.U

.)

Run 6 p+p @ 200 GeV

0

Run 7 Au+Au @ 200 GeV, cent=0~20%, preliminary

Direct trigger with associate hadronQM08 PHENIX

p+p: C

onsistent with trigger photon carr

ying the full jet energy, away side jets ar

e similar betw

een 0 and

triggers.

Need m

ore studies and statistics for A

u+A

u case.

Run 4/5 p+p/Au+Au @ 200 GeV


3<pTtrig<4GeV/c & 1.0<pT

asso<1.5GeV/c 20-60%STAR

= associate - trigger (rad)

Jet modification and geometry(and v2)

QM08: STAR, PHENIX

QM04: STAR

Mach-cone shape depends on R.P. angle.Mach-cone is a source of of v2


STAR Preliminary

Rid

ge

Jet

3<pTtrig<4, 1.5<pT

trig<2.0 GeV/c

QM08 STAR

STAR

(rad)

RidgeRidge

“jet”Au+Au, 200 GeVRidge/Cone and

geometry (v2)

Ridge shape depends on R.P. angle.Ridge is a source of of v2

Jet does not depends on itJet reduces v2

Jet

Rid

ge

Shou

lder

(co

ne)

Hea

d (

)Rid

ge

Shou

lder

(co

ne)

v2

v2


(1)

(2)

(3)

(4)

(2)

(3)

(4)

(1)

Trigger

particle

x(R.P.) x(R.P.)

yy

(2)Trigger

particle

ASSO.TRIG.

associate particle direction at

same || w.r.t. trigger particle

but with different arrow length

associate particle direction at

same || w.r.t. red dashed line

but with different arrow length

In order to study the jet modification (mach-cone, ridge) and it’s relation with almond geometry in more detail…

with and without R.P. aligned event mixing


The PHENIX CollaborationUniversidade de São Paulo, Instituto de Física, Caixa Postal 66318, São Paulo CEP05315-970, BrazilInstitute of Physics, Academia Sinica, Taipei 11529, TaiwanChina Institute of Atomic Energy (CIAE), Beijing, People's Republic of ChinaPeking University, Beijing, People's Republic of ChinaCharles University, Ovocnytrh 5, Praha 1, 116 36, Prague, Czech RepublicCzech Technical University, Zikova 4, 166 36 Prague 6, Czech RepublicInstitute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Prague 8, Czech RepublicHelsinki Institute of Physics and University of Jyväskylä, P.O.Box 35, FI-40014 Jyväskylä, FinlandDapnia, CEA Saclay, F-91191, Gif-sur-Yvette, FranceLaboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS-IN2P3, Route de Saclay, F-91128, Palaiseau, FranceLaboratoire de Physique Corpusculaire (LPC), Université Blaise Pascal, CNRS-IN2P3, Clermont-Fd, 63177 Aubiere Cedex, FranceIPN-Orsay, Universite Paris Sud, CNRS-IN2P3, BP1, F-91406, Orsay, FranceSUBATECH (Ecole des Mines de Nantes, CNRS-IN2P3, Université de Nantes) BP 20722 - 44307, Nantes, FranceInstitut für Kernphysik, University of Münster, D-48149 Münster, GermanyDebrecen University, H-4010 Debrecen, Egyetem tér 1, HungaryELTE, Eötvös Loránd University, H - 1117 Budapest, Pázmány P. s. 1/A, HungaryKFKI Research Institute for Particle and Nuclear Physics of the Hungarian Academy of Sciences (MTA KFKI RMKI), H-1525 Budapest 114, POBox 49, Budapest, HungaryDepartment of Physics, Banaras Hindu University, Varanasi 221005, IndiaBhabha Atomic Research Centre, Bombay 400 085, IndiaWeizmann Institute, Rehovot 76100, IsraelCenter for Nuclear Study, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, JapanHiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526, JapanKEK, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, JapanKyoto University, Kyoto 606-8502, JapanNagasaki Institute of Applied Science, Nagasaki-shi, Nagasaki 851-0193, JapanRIKEN, The Institute of Physical and Chemical Research, Wako, Saitama 351-0198, JapanPhysics Department, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 171-8501, JapanDepartment of Physics, Tokyo Institute of Technology, Oh-okayama, Meguro, Tokyo 152-8551, JapanInstitute of Physics, University of Tsukuba, Tsukuba, Ibaraki 305, JapanWaseda University, Advanced Research Institute for Science and Engineering, 17 Kikui-cho, Shinjuku-ku, Tokyo 162-0044, JapanChonbuk National University, Jeonju, KoreaEwha Womans University, Seoul 120-750, KoreaKAERI, Cyclotron Application Laboratory, Seoul, South KoreaKangnung National University, Kangnung 210-702, South KoreaKorea University, Seoul, 136-701, KoreaMyongji University, Yongin, Kyonggido 449-728, KoreaSystem Electronics Laboratory, Seoul National University, Seoul, South KoreaYonsei University, IPAP, Seoul 120-749, KoreaIHEP Protvino, State Research Center of Russian Federation, Institute for High Energy Physics, Protvino, 142281, RussiaJoint Institute for Nuclear Research, 141980 Dubna, Moscow Region, RussiaRussian Research Center "Kurchatov Institute", Moscow, RussiaPNPI, Petersburg Nuclear Physics Institute, Gatchina, Leningrad region, 188300, RussiaSaint Petersburg State Polytechnic University, St. Petersburg, RussiaSkobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Vorob'evy Gory, Moscow 119992, Russia Department of Physics, Lund University, Box 118, SE-221 00 Lund, Sweden

Abilene Christian University, Abilene, TX 79699, U.S.Collider-Accelerator Department, Brookhaven National Laboratory, Upton, NY 11973-5000, U.S.Physics Department, Brookhaven National Laboratory, Upton, NY 11973-5000, U.S.University of California - Riverside, Riverside, CA 92521, U.S.University of Colorado, Boulder, CO 80309, U.S.Columbia University, New York, NY 10027 and Nevis Laboratories, Irvington, NY 10533, U.S.Florida Institute of Technology, Melbourne, FL 32901, U.S.Florida State University, Tallahassee, FL 32306, U.S.Georgia State University, Atlanta, GA 30303, U.S.University of Illinois at Urbana-Champaign, Urbana, IL 61801, U.S.Iowa State University, Ames, IA 50011, U.S.Lawrence Livermore National Laboratory, Livermore, CA 94550, U.S.Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.University of Maryland, College Park, MD 20742, U.S.Department of Physics, University of Massachusetts, Amherst, MA 01003-9337, U.S. Muhlenberg College, Allentown, PA 18104-5586, U.S.University of New Mexico, Albuquerque, NM 87131, U.S. New Mexico State University, Las Cruces, NM 88003, U.S.Oak Ridge National Laboratory, Oak Ridge, TN 37831, U.S.RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, NY 11973-5000, U.S.Chemistry Department, Stony Brook University, Stony Brook, SUNY, NY 11794-3400, U.S.Department of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, NY 11794, U.S.University of Tennessee, Knoxville, TN 37996, U.S.Vanderbilt University, Nashville, TN 37235, U.S.

14 Countries 69 Institutions

Summary and Conclusion•2- and 3- particle correlation and transverse momentum dependence of jet-modification tells us that it is likely a mach-cone. •Mach-cone and ridge are almost as soft as inclusive particles. •Identified particle (baryon, meson, 0, ) correlation measurements in PHENIX•Mach-cone and ridge w.r.t. reaction plane angle tells us that this is a part of v2


Extra and Back-up Slides


System Size and Beam Energy Dependence of Jet Shape

nucl-ex/0611019

No energy dependence (62 ~ 200GeV)Rapid change between Npart = 0 ~ 100Almost no change above Npart > 100


PRC 71 0519022.4<pT

Trig<4 GeV/c 1.7< pTAsso<2.5 Ge

V/c

Identified Baryon/Meson trigger with associate hadron

Enhanced near-side yield can not be explained by soft process like thermal recombination alone.


R.P.

(1)(2)

(3)

(4)

(5)

(6)(7)

(8)ave (1)~(8)

ave (1),(8) ave (2),(7) ave (3),(6) ave (4),(5)

(1) (2) (3) (4)(8) (7) (6) (5)

Pure Flow Simulationwith trigger angle selection w.r.t. R.P.with/without R.P. aligned event mixing

wit

hout

R.P

. ali

gned

eve

nt m

ixin

gw

ith

R.P

. ali

gned

ev

ent m

ixin

g

(1) (2) (3) (4)(8) (7) (6) (5)

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ShinIchi Esumi for the PHENIX collaboration Inst. of Physics, Univ. of Tsukuba, Japan

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