Photoproduction of J/ψ and of high mass e+e- in ultra-peripheral Au plus Au collisions at √sNN=200 GeV

被引:121
作者
Afanasiev, S. [18 ]
Aidala, C. [7 ,8 ]
Ajitanand, N. N. [43 ]
Akiba, Y. [1 ,38 ]
Alexander, J. [43 ]
Al-Jamel, A. [34 ]
Aoki, K. [24 ,38 ]
Aphecetche, L. [45 ]
Armendariz, R. [34 ]
Aronson, S. H.
Averbeck, R. [44 ]
Awes, T. C. [35 ]
Azmoun, B.
Babintsev, V. [15 ]
Baldisseri, A. [9 ]
Barish, K. N. [4 ]
Barnes, P. D. [27 ]
Bassalleck, B. [33 ]
Bathe, S. [4 ]
Batsouli, S. [7 ,8 ]
Baublis, V. [37 ]
Bauer, F. [4 ]
Bazilevsky, A.
Belikov, S. [17 ]
Bennett, R. [44 ]
Berdnikov, Y. [40 ]
Bjorndal, M. T. [7 ,8 ]
Boissevain, J. G. [27 ]
Borel, H. [9 ]
Boyle, K. [44 ]
Brooks, M. L. [27 ]
Brown, D. S. [34 ]
Bucher, D. [30 ]
Buesching, H.
Bumazhnov, V. [15 ]
Bunce, G. [1 ]
Burward-Hoy, J. M. [27 ]
Butsyk, S. [44 ]
Campbell, S. [44 ]
Chai, J. -S. [19 ]
Chernichenko, S. [15 ]
Chiba, J. [20 ]
Chi, C. Y. [7 ,8 ]
Chiu, M. [7 ]
Choi, I. J. [52 ]
Chujo, T. [49 ]
Cianciolo, V. [35 ]
Cleven, C. R.
Cobigo, Y. [13 ]
Cole, B. A. [7 ,8 ]
机构
[1] Brookhaven Natl Lab, RIKEN, BNL Res Ctr, Upton, NY 11973 USA
[2] Abilene Christian Univ, Abilene, TX 79699 USA
[3] Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India
[4] Univ Calif Riverside, Riverside, CA 92521 USA
[5] Univ Tokyo, Grad Sch Sci, Ctr Nucl Study, Bunkyo Ku, Tokyo 1130033, Japan
[6] Univ Colorado, Boulder, CO 80309 USA
[7] Columbia Univ, New York, NY 10027 USA
[8] Nevis Labs, Irvington, NY 10533 USA
[9] CEA Saclay, F-91191 Gif Sur Yvette, France
[10] Univ Debrecen, H-4010 Debrecen, Hungary
[11] Eotvos Lorand Univ, ELTE, H-1117 Budapest, Hungary
[12] Florida State Univ, Tallahassee, FL 32306 USA
[13] Georgia State Univ, Atlanta, GA 30303 USA
[14] Hiroshima Univ, Higashihiroshima 7398526, Japan
[15] Inst High Energy Phys, State Res Ctr Russian Federat, IHEP Protvino, Protvino 142281, Russia
[16] Univ Illinois, Urbana, IL 61801 USA
[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] High Energy Accelerator Res Org, KEK, Tsukuba, Ibaraki 3050801, Japan
[21] Hungarian Acad Sci, Res Inst Particle & Nucl Phys, MTA KFKI RMKI, H-1525 Budapest, Hungary
[22] Korea Univ, Seoul 136701, South Korea
[23] Russian Res Ctr, Kurchatov Inst, Moscow, Russia
[24] Kyoto Univ, Kyoto 6068502, Japan
[25] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France
[26] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[27] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[28] Univ Blaise Pascal, CNRS, LPC, IN2P3, F-63177 Clermont Ferrand, France
[29] Lund Univ, Dept Phys, SE-22100 Lund, Sweden
[30] Univ Munster, Inst Kernphys, D-48149 Munster, Germany
[31] Myongji Uni, Yongin 449728, Kyonggido, South Korea
[32] Nagasaki Inst Appl Sci, Nagasaki 8510193, Japan
[33] Univ New Mexico, Albuquerque, NM 87131 USA
[34] New Mexico State Univ, Las Cruces, NM 88003 USA
[35] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
[36] Univ Paris 11, CNRS, IPN Orsay, IN2P3, F-91406 Orsay, France
[37] Petersburg Nucl Phys Inst, PNPI, Gatchina 188300, Leningrad Reg, Russia
[38] RIKEN, Nishina Ctr Accelerator Based Sci, Wako, Saitama 3510198, Japan
[39] Rikkyo Univ, Dept Phys, Toshima Ku, Tokyo 1718501, Japan
[40] St Petersburg State Polytech Univ, St Petersburg, Russia
[41] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo, Brazil
[42] Seoul Natl Univ, Syst Elect Lab, Seoul, South Korea
[43] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA
[44] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA
[45] Univ Nantes, CNRS, Ecole Mines Nantes, SUBATECH,IN2P3, F-44307 Nantes, France
[46] Univ Tennessee, Knoxville, TN 37996 USA
[47] Tokyo Inst Technol, Dept Phys, Meguro Ku, Tokyo 1528551, Japan
[48] Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 305, Japan
[49] Vanderbilt Univ, Nashville, TN 37235 USA
[50] Waseda Univ, Adv Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1620044, Japan
基金
巴西圣保罗研究基金会;
关键词
ION; NUCLEUS;
D O I
10.1016/j.physletb.2009.07.061
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present the first measurement of photoproduction of J/psi and of two-photon production of high-mass e(+)e(-) pairs in electromagnetic (or ultra-peripheral) nucleus-nucleus interactions, using Au + Au data at root s(NN) = 200 GeV. The events are tagged with forward neutrons emitted following Coulomb excitation of one or both Au* nuclei. The event sample consists of 28 events with m(e+e-) > 2 GeV/c(2) with zero like-sign background. The measured cross sections at midrapidity of d sigma/dy (J/psi + Xn, y = 0) = 76 +/- 33 (stat) +/- 11 (syst) pb and d(2)sigma /dm dy (e(+) e(-) + Xn, y = 0) = 86 +/- 23(stat) +/- 16(syst) mu b/ (GeV/c(2)) for m(e+e-) epsilon vertical bar 2.0, 2.8 vertical bar GeV/c(2) have been compared and found to be consistent with models for photoproduction of J/psi and QED based calculations of two-photon production of e(+)e(-) pairs. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:321 / 329
页数:9
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