Dihadron azimuthal correlations in Au+Au collisions at √sNN=200 GeV

被引：288

作者：

Adare, A. ^{[1
]}

Afanasiev, S. ^{[23
]}

Aidala, C. ^{[9
,10
]}

Ajitanand, N. N. ^{[50
]}

Akiba, Y. ^{[44
,45
]}

Al-Bataineh, H. ^{[39
]}

Alexander, J. ^{[50
]}

Al-Jamel, A. ^{[39
]}

Aoki, K. ^{[29
,44
]}

Aphecetche, L. ^{[52
]}

Armendariz, R. ^{[39
]}

Aronson, S. H. ^{[4
]}

Asai, J. ^{[45
]}

Atomssa, E. T. ^{[30
]}

Averbeck, R.

Awes, T. C. ^{[40
]}

Azmoun, B. ^{[4
]}

Babintsev, V. ^{[19
]}

Baksay, G. ^{[15
]}

Baksay, L. ^{[15
]}

Baldisseri, A. ^{[12
]}

Barish, K. N. ^{[5
]}

Barnes, P. D. ^{[32
]}

Bassalleck, B. ^{[38
]}

Bathe, S. ^{[5
]}

Batsouli, S. ^{[9
,10
,40
]}

Baublis, V. ^{[43
]}

Bauer, F. ^{[5
]}

Bazilevsky, A. ^{[4
]}

Belikov, S. ^{[4
,22
]}

Bennett, R.

Berdnikov, Y. ^{[47
]}

Bickley, A. A. ^{[1
]}

Bjorndal, M. T. ^{[9
,10
]}

Boissevain, J. G. ^{[32
]}

Borel, H. ^{[12
]}

Boyle, K.

Brooks, M. L. ^{[32
]}

Brown, D. S. ^{[39
]}

Bucher, D. ^{[35
]}

Buesching, H. ^{[4
]}

Bumazhnov, V. ^{[19
]}

Bunce, G. ^{[4
,45
]}

Burward-Hoy, J. M. ^{[32
]}

Butsyk, S. ^{[32
]}

Campbell, S.

Chai, J. -S. ^{[24
]}

Chang, B. S. ^{[59
]}

Charvet, J. -L. ^{[12
]}

Chernichenko, S. ^{[19
]}

机构：

[1] Univ Colorado, Boulder, CO 80309 USA

[2] Abilene Christian Univ, Abilene, TX 79699 USA

[3] Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India

[4] Brookhaven Natl Lab, Upton, NY 11973 USA

[5] Univ Calif Riverside, Riverside, CA 92521 USA

[6] Charles Univ Prague, CR-11636 Prague, Czech Republic

[7] China Inst Atom Energy, Beijing, Peoples R China

[8] Univ Tokyo, Grad Sch Sci, Ctr Nucl Study, Bunkyo Ku, Tokyo 1130033, Japan

[9] Nevis Labs, Irvington, NY 10533 USA

[10] Columbia Univ, New York, NY 10027 USA

[11] Czech Tech Univ, Prague 16636 6, Czech Republic

[12] CEA Saclay, F-91191 Gif Sur Yvette, France

[13] Univ Debrecen, H-4010 Debrecen, Hungary

[14] Eotvos Lorand Univ, ELTE, H-1117 Budapest, Hungary

[15] Florida Inst Technol, Melbourne, FL 32901 USA

[16] Florida State Univ, Tallahassee, FL 32306 USA

[17] Georgia State Univ, Atlanta, GA 30303 USA

[18] Hiroshima Univ, Higashihiroshima 7398526, Japan

[19] Inst High Energy Phys, State Res Ctr Russian Fed, IHEP Protvino, RU-142281 Protvino, Russia

[20] Univ Illinois, Urbana, IL 61801 USA

[21] Acad Sci Czech Republ, Inst Phys, Prague 18221 8, Czech Republic

[22] Iowa State Univ, Ames, IA 50011 USA

[23] Joint Inst Nucl Res, RU-141980 Moscow, Russia

[24] KAERI, Cyclotron Applicat Lab, Seoul, South Korea

[25] High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki 3050801, Japan

[26] Hungarian Acad Sci MTA KFKI RMKI, KFKI Res Inst Particle & Nucl Phys, H-1525 Budapest, Hungary

[27] Korea Univ, Seoul 136701, South Korea

[28] IV Kurchatov Atom Energy Inst, Russian Res Ctr, Moscow 123182, Russia

[29] Kyoto Univ, Kyoto 6068502, Japan

[30] Ecole Polytech, CNRS IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France

[31] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[32] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[33] Univ Blaise Pascal, LPC, CNRS IN2P3, F-63177 Aubiere, France

[34] Lund Univ, Dept Phys, SE-22100 Lund, Sweden

[35] Univ Munster, Inst Kernphys, D-48149 Munster, Germany

[36] Myongji Univ, Yongin 449728, Kyonggido, South Korea

[37] Nagasaki Inst Appl Sci, Nagasaki 8510193, Japan

[38] Univ New Mexico, Albuquerque, NM 87131 USA

[39] New Mexico State Univ, Las Cruces, NM 88003 USA

[40] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[41] Univ Paris 11, IPN Orsay, CNRS IN2P3, F-91406 Orsay, France

[42] Peking Univ, Beijing 100871, Peoples R China

[43] Petersburg Nucl Phys Inst, RU-188300 St Petersburg, Russia

[44] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan

[45] Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA

[46] Rikkyo Univ, Dept Phys, Tokyo 1718501, Japan

[47] St Petersburg State Polytech Univ, St Petersburg, Russia

[48] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil

[49] Seoul Natl Univ, Syst Elect Lab, Seoul, South Korea

[50] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA

来源：

PHYSICAL REVIEW C | 2008年 / 78卷 / 01期

关键词：

D O I：

10.1103/PhysRevC.78.014901

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Azimuthal angle (Delta phi) correlations are presented for a broad range of transverse momentum (0.4 < p(T) < 10 GeV/c) and centrality (0-92%) selections for charged hadrons from dijets in Au+Au collisions at root s(NN) = 200 GeV. With increasing p(T), the away-side Delta phi distribution evolves from a broad and relatively flat shape to a concave shape, then to a convex shape. Comparisons with p + p data suggest that the away-side distribution can be divided into a partially suppressed "head" region centered at Delta phi similar to pi, and an enhanced "shoulder" region centered at Delta phi similar to pi +/- 1.1. The p(T) spectrum for the associated hadrons in the head region softens toward central collisions. The spectral slope for the shoulder region is independent of centrality and trigger p(T). The properties of the near-side distributions are also modified relative to those in p + p collisions, reflected by the broadening of the jet shape in Delta phi and Delta eta, and an enhancement of the per-trigger yield. However, these modifications seem to be limited to p(T)less than or similar to 4 GeV/c, above which both the hadron pair shape and per-trigger yield become similar to p + p collisions. These observations suggest that both the away- and near-side distributions contain a jet fragmentation component which dominates for p(T) greater than or similar to 5 GeV/c and a medium-induced component which is important for p(T) less than or similar to 4 GeV/c. We also quantify the role of jets at intermediate and low p(T) through the yield of jet-induced pairs in comparison with binary scaled p + p pair yield. The yield of jet-induced pairs is suppressed at high pair proxy energy (sum of the p(T) magnitudes of the two hadrons) and is enhanced at low pair proxy energy. The former is consistent with jet quenching; the latter is consistent with the enhancement of soft hadron pairs due to transport of lost energy to lower p(T).

引用

页数：42

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