Suppressed π0 production at large transverse momentum in central Au plus Au collisions at √sNN=200 GeV -: art. no. 072301

被引:497
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] Brookhaven Natl Lab, Upton, NY 11973 USA
[2] Abilene Christian Univ, Abilene, TX 79699 USA
[3] Acad Sinica, Inst Phys, Taipei 11529, Taiwan
[4] Banaras Hindu Univ, Dept Phys, Varanasi 221005, Uttar Pradesh, India
[5] Bhabha Atom Res Ctr, Bombay 400085, Maharashtra, 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] 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] Inst High Energy Phys, 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] Natl Lab High Energy Phys, KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan
[22] KFKI, Res Inst Particle & Nucl Phys RMKI, H-1525 Budapest 114, Hungary
[23] Korea Univ, Seoul 136701, South Korea
[24] Russian Res Ctr, Kurchatov 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, 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, Yongin 449728, Kyonggido, South Korea
[33] Nagasaki 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, CNRS, IN2P3, F-91406 Orsay, France
[38] Petersburg Nucl Phys Inst, Gatchina, 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 Tech 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, 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 305, Japan
[50] Vanderbilt Univ, Nashville, TN 37235 USA
关键词
D O I
10.1103/PhysRevLett.91.072301
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Transverse momentum spectra of neutral pions in the range 1<p(T)<10 GeV/c have been measured at midrapidity by the PHENIX experiment at BNL RHIC in Au+Au collisions at roots(NN)=200 GeV. The pi(0) multiplicity in central reactions is significantly below the yields measured at the same roots(NN) in peripheral Au+Au and p+p reactions scaled by the number of nucleon-nucleon collisions. For the most central bin, the suppression factor is similar to2.5 at p(T)=2 GeV/c and increases to similar to4-5 at p(T)approximate to4 GeV/c. At larger p(T), the suppression remains constant within errors. The deficit is already apparent in semiperipheral reactions and increases smoothly with centrality.
引用
收藏
页码:723011 / 723016
页数:6
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