Energy loss and flow of heavy quarks in Au+Au collisions at √sNN = 200 GeV

被引：382

作者：

Adare, A. ^{[1
]}

Afanasiev, S.

Aidala, C.

Ajitanand, N. N.

Akiba, Y.

Al-Bataineh, H.

Alexander, J.

Al-Jamel, A.

Aoki, K.

Aphecetche, L.

Armendariz, R.

Aronson, S. H.

Asai, J.

Atomssa, E. T.

Averbeck, R.

Awes, T. C.

Azmoun, B.

Babintsev, V.

Baksay, G.

Baksay, L.

Baldisseri, A.

Barish, K. N.

Barnes, P. D.

Bassalleck, B.

Bathe, S.

Batsouli, S.

Baublis, V.

Bauer, F.

Bazilevsky, A.

Belikov, S.

Bennett, R.

Berdnikov, Y.

Bickley, A. A.

Bjorndal, M. T.

Boissevain, J. G.

Borel, H.

Boyle, K.

Brooks, M. L.

Brown, D. S.

Bucher, D.

Buesching, H.

Bumazhnov, V.

Bunce, G.

Burward-Hoy, J. M.

Butsyk, S.

Campbell, S.

Chai, J.-S.

Chang, B. S.

Charvet, J.-L.

Chernichenko, S.

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, Prague 11636, Czech Republic

[7] CIAE, Beijing, Peoples R China

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

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

[10] Nevis Labs, Irvington, NY 10533 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] State Res Ctr Russian Federat, Inst High Energy Phys, IHEP Protvino, Protvino 142281, 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, Dubna 141980, Russia

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

[25] KEK, High Energy Accelerator Res Org, 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, Lab Leprince Ringuet, CNRS, IN2P3, 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 Clermont Ferrand, France

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

[35] Univ Munster, Inst Kernphys, D-49149 Munster, Germany

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

[37] Nagasaki Inst Appl Sci, Nagasaki, 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 Sud, IPN Orsay, CNRS, F-91406 Orsay, France

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

[43] Petersburg Nucl Phys Inst, PNPI, St Petersburg 188300, 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 LETTERS | 2007年 / 98卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.98.172301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The PHENIX experiment at the BNL Relativistic Heavy Ion Collider (RHIC) has measured electrons with 0.3 < p(T) < 9 GeV/c at midrapidity (\y\ < 0.35) from heavy-flavor (charm and bottom) decays in Au + Au collisions at root s(NN) = 200 GeV. The nuclear modification factor R-AA relative to p + p collisions shows a strong suppression in central Au + Au collisions, indicating substantial energy loss of heavy quarks in the medium produced at RHIC energies. A large azimuthal anisotropy v(2) with respect to the reaction plane is observed for 0.5 < p(T) < 5 GeV/c indicating substantial heavy-flavor elliptic flow. Both R-AA and v(2) show a p(T) dependence different from those of neutral pions. A comparison to transport models which simultaneously describe R-AA(p(T)) and v(2)(p(T)) suggests that the viscosity to entropy density ratio is close to the conjectured quantum lower bound, i.e., near a perfect fluid.

引用

页数：6