Measurement of single electron event anisotropy in Au plus Au collisions at √sNN=200 GeV -: art. no. 024901

被引：68

作者：

Adler, SS ^{[1
]}

Afanasiev, S

Aidala, C

Ajitanand, NN

Akiba, Y

Alexander, J

Amirikas, R

Aphecetche, L

Aronson, SH

Averbeck, R

Awes, TC

Azmoun, R

Babintsev, V

Baldisseri, A

Barish, KN

Barnes, PD

Bassalleck, B

Bathe, S

Batsouli, S

Baublis, V

Bazilevsky, A

Belikov, S

Berdnikov, Y

Bhagavatula, S

Boissevain, JG

Borel, H

Borenstein, S

Brooks, ML

Brown, DS

Bruner, N

Bucher, D

Buesching, H

Bumazhnov, V

Bunce, G

Burward-Hoy, JM

Butsyk, S

Camard, X

Chai, JS

Chand, P

Chang, WC

Chernichenko, S

Chi, CY

Chiba, J

Chiu, M

Choi, IJ

Choi, J

Choudhury, RK

Chujo, T

Cianciolo, V

Cobigo, Y

机构：

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

[2] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

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

[4] Bhabha Atom Res Ctr, Bombay 400085, Maharashtra, India

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

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

[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, New York, NY 10533 USA

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

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

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

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

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

[15] Hiroshima Univ, Higashihiroshima 7398526, Japan

[16] Inst High Energy Phys, Protvino, Russia

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

[18] Joint Inst Nucl Res, Dubna 141980, Russia

[19] KAERI, Cyclotron Appl Lab, Seoul, South Korea

[20] Kangnung Natl Univ, Kangnung 210702, South Korea

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

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

[23] Korea Univ, Seoul 136701, South Korea

[24] Russell Res Ctr, SV Kurashov Med Inst, Moscow, Russia

[25] Kyoto Univ, Kyoto 6068502, Japan

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

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

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

[29] Univ Clermont Ferrand, CNRS, IN2P3, LPC, F-63177 Clermont Ferrand, France

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

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

[32] Myongji Univ, Kyonggi Do 449728, South Korea

[33] Nagaski Inst Appl Sci, Nagasaki 8510193, Japan

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

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

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

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

[38] PNPI, Petersburg Nucl Phys Inst, St Petersburg 188300, Russia

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

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

[41] St Petersburg State Univ, St Petersburg, Russia

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

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

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

[45] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA

[46] Univ Nantes, CNRS, IN2P3, SUBATECH, F-44307 Nantes, France

[47] Univ Tennessee, Knoxville, TN 37996 USA

[48] Tokyo Inst Technol, Dept Phys, Tokyo 1528551, Japan

[49] Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 305, Japan

[50] Vanderbilt Univ, Nashville, TN 37235 USA

来源：

PHYSICAL REVIEW C | 2005年 / 72卷 / 02期

关键词：

D O I：

10.1103/PhysRevC.72.024901

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：

The transverse momentum dependence of the azimuthal anisotropy parameter v(2), the second harmonic of the azimuthal distribution, for electrons at midrapidity (vertical bar eta vertical bar < 0.35) has been measured with the PHENIX detector in Au+Au collisions at root s(NN) = 200 GeV. The measurement was made with respect to the reaction plane defined at high rapidities (vertical bar eta vertical bar = 3.1-3.9). From the result we have measured the v(2) of electrons from heavy flavor decay after subtraction of the v(2) of electrons from other sources such as photon conversions and Dalitz decay from light neutral mesons. We observe a nonzero single electron v(2) with a 90% confidence level in the intermediate-p(T) region. The precision of the present data set does not permit us to conclude definitively that heavy quarks exhibit thermalization with the transverse flow of the bulk matter.

引用

页数：10

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