Measurement of single electrons and implications for charm production in Au+Au collisions at √SNN=130 GeV -: art. no. 192303

被引：153

作者：

Adcox, K

Adler, SS

Ajitanand, NN

Akiba, Y

Alexander, J

Aphecetche, L

Arai, Y

Aronson, SH

Averbeck, R

Awes, TC

Barish, KN

Barnes, PD

Barrette, J

Bassalleck, B

Bathe, S

Baublis, V

Bazilevsky, A

Belikov, S

Bellaiche, FG

Belyaev, ST

Bennett, MJ

Berdnikov, Y

Botelho, S

Brooks, ML

Brown, DS

Bruner, N

Bucher, D

Buesching, H

Bumazhnov, V

Bunce, G

Burward-Hoy, J

Butsyk, S

Carey, TA

Chand, P

Chang, J

Chang, WC

Chavez, LL

Chernichenko, S

Chi, CY

Chiba, J

Chiu, M

Choudhury, RK

Christ, T

Chujo, T

Chung, MS

Chung, P

Cianciolo, V

Cole, BA

D'Enterria, DG

David, G

机构：

[1] Vanderbilt Univ, Nashville, TN 37235 USA

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

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

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

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

[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] Columbia Univ, New York, NY 10027 USA

[10] Nevis Labs, Irvington, NY 10533 USA

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

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

[13] Hiroshima Univ, Higashihiroshima 7398526, Japan

[14] Inst High Energy Phys, Protvino, Russia

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

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

[17] Korea Univ, Seoul 136701, South Korea

[18] Russian Res Ctr, Kurchatov Inst, Moscow, Russia

[19] Kyoto Univ, Kyoto 606, Japan

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

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

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

[23] McGill Univ, Montreal, PQ H3A 2T8, Canada

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

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

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

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

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

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

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

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

[32] Petersburg Nucl Phys Inst, Gatchina, Russia

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

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

[35] Univ Nantes, SUBATECH, Ecole Mines Nantes, CNRS,IN2P3, F-44307 Nantes 3, France

[36] St Petersburg State Tech Univ, St Petersburg, Russia

[37] Univ Tennessee, Knoxville, TN 37996 USA

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

[39] Univ Tokyo, Tokyo, Japan

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

[41] Waseda Univ, Adv Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1620044, Japan

[42] Weizmann Inst Sci, IL-76100 Rehovot, Israel

[43] Yonsei Univ, IPAP, Seoul 120749, South Korea

[44] KFKI Res Inst Particle & Nucl Phys, Budapest, Hungary

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.88.192303

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Transverse momentum spectra of electrons from Au+Au collisions at roots(NN) = 130 GeV have been measured at midrapidity by the PHENIX experiment at the Relativistic Heavy Ion Collider. The spectra show an excess above the background from photon conversions and light hadron decays. The electron signal is consistent with that expected from semileptonic decays of charm. The yield of the electron signal dN(e)/dy for p(T) > 0.8 GeV/c is 0.025 +/- 0.004(stat) +/- 0.010( syst) in central collisions, and the corresponding charm cross section is 380 +/- 60(stat) +/- 200(syst ) mub per binary nucleon-nucleon collision.

引用

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