Centrality dependence of charm production from a measurement of single electrons in Au plus Au collisions at √sNN=200 GeV -: art. no. 082301

被引：320

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] CIAE, Beijing, Peoples R China

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

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

[10] Nevis Labs, Irvington, NY 10533 USA

[11] CEA Saclay, Dapnia, 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] IHEP, Protvino, Russia

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

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

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

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

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

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

[23] Korea Univ, Seoul 136701, South Korea

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

[25] Kyoto Univ, Kyoto 606, Japan

[26] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, 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, LPC, CNRS, IN2P3, 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, Yongin 449728, Kyonggido, South Korea

[33] Nagasaki Inst Appl Sci, Nagasaki, 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] Petersburg Nucl Phys Inst, Gatchina, Russia

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

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

[41] St Petersburg State Univ, St Petersburg 198904, 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, Ecole Mines Nantes,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 LETTERS | 2005年 / 94卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.94.082301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The PHENIX experiment has measured midrapidity transverse momentum spectra (0.4<p(T)<4.0 GeV/c) of single electrons as a function of centrality in Au+Au collisions at roots(NN) = 200 GeV. Contributions from photon conversions and Dalitz decays of light neutral mesons are measured by introducing a thin (1.7% X-0) converter into the PHENIX acceptance and are statistically removed. The subtracted nonphotonic electron spectra are primarily due to the semileptonic decays of hadrons containing heavy quarks, mainly charm at lower p(T). For all centralities, the charm production cross section is found to scale with the nuclear overlap function, T-AA. For minimum-bias collisions the charm cross section per binary collision is N-c (c) over bar/T-AA=622+/-57(stat)+/-160(syst) mub.

引用

页码：1 / 6

页数：6

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