Centrality dependence of charged-particle pseudorapidity distributions from d plus Au collisions at √sNN=200 GeV -: art. no. 032301

被引:49
作者
Arsene, I [1 ]
Bearden, IG
Beavis, D
Besliu, C
Budick, B
Boggild, H
Chasman, C
Christensen, CH
Christiansen, P
Cibor, J
Debbe, R
Enger, E
Gaardhoje, JJ
Germinario, M
Hagel, K
Ito, H
Jipa, A
Jordre, JI
Jundt, F
Jorgensen, CE
Karabowicz, R
Kim, EJ
Kozik, T
Larsen, TM
Lee, JH
Lee, YK
Lindal, S
Lystad, R
Lovhoiden, G
Majka, Z
Makeev, A
Mikelsen, M
Murray, M
Natowitz, J
Neumann, B
Nielsen, BS
Ouerdane, D
Planeta, R
Rami, F
Ristea, C
Ristea, O
Röhrich, D
Samset, BH
Sandberg, D
Sanders, SJ
Sheetz, RA
Staszel, P
Tveter, TS
Videbæk, F
Wada, R
机构
[1] Univ Bucharest, Bucharest, Romania
[2] Brookhaven Natl Lab, Upton, NY 11973 USA
[3] Inst Rech Subatom, Strasbourg, France
[4] Univ Louis Pasteur Strasbourg 1, Strasbourg, France
[5] Inst Nucl Phys, Krakow, Poland
[6] Jagiellonian Univ, Krakow, Poland
[7] Johns Hopkins Univ, Baltimore, MD 21218 USA
[8] NYU, New York, NY 10003 USA
[9] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark
[10] Texas A&M Univ, College Stn, TX 77843 USA
[11] Univ Bergen, Dept Phys, Bergen, Norway
[12] Univ Kansas, Lawrence, KS 66045 USA
[13] Univ Oslo, Dept Phys, Oslo, Norway
关键词
D O I
10.1103/PhysRevLett.94.032301
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Charged-particle pseudorapidity densities are presented for the d+Au reaction at roots(NN)=200 GeV with -4.2less than or equal toetaless than or equal to4.2. The results, from the BRAHMS experiment at BNL Relativistic Heavy-Ion Collider, are shown for minimum-bias events and 0%-30%, 30%-60%, and 60%-80% centrality classes. Models incorporating both soft physics and hard, perturbative QCD-based scattering physics agree well with the experimental results. The data do not support predictions based on strong-coupling, semiclassical QCD. In the deuteron-fragmentation region the central 200 GeV data show behavior similar to full-overlap d+Au results at roots(NN)=19.4 GeV.
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