Charged hadron transverse momentum distributions in Au plus Au collisions at √sNN=200 GeV

被引:147
|
作者
Back, BB
Baker, MD
Barton, DS
Betts, RR
Ballintijn, M
Bickley, AA
Bindel, R
Budzanowski, A
Busza, W
Carroll, A
Decowski, MP
García, E
George, N
Gulbrandsen, K
Gushue, S
Halliwell, C
Hamblen, J
Heintzelman, GA
Henderson, C
Hofman, DJ
Hollis, RS
Holynski, R
Holzman, B
Iordanova, A
Johnson, E
Kane, JL
Katzy, J
Khan, N
Kucewicz, W
Kulinich, P
Kuo, CM
Lin, WT
Lee, JW
Manly, S
McLeod, D
Mignerey, AC
Nouicer, R
Olszewski, A
Pak, R
Park, IC
Pernegger, H
Reed, C
Remsberg, LP
Reuter, M
Roland, C
Roland, G
Rosenberg, L
Sagerer, J
Sarin, P
Sawicki, P
机构
[1] MIT, Cambridge, MA 02139 USA
[2] Argonne Natl Lab, Argonne, IL 60439 USA
[3] Brookhaven Natl Lab, Upton, NY 11973 USA
[4] Inst Nucl Phys, Krakow, Poland
[5] Natl Cent Univ, Chungli 32054, Taiwan
[6] Univ Illinois, Chicago, IL 60607 USA
[7] Univ Maryland, College Pk, MD 20742 USA
[8] Univ Rochester, Rochester, NY 14627 USA
关键词
D O I
10.1016/j.physletb.2003.10.101
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present transverse momentum distributions of charged hadrons produced in Au + Au collisions at roots(NN) = 200 GeV. The spectra were measured for transverse momenta p(T) from 0.25 to 4.5 GeV/c in a pseudorapidity range of 0.2 < 17 < 1.4. The evolution of the spectra is studied as a function of collision centrality, from 65 to 344 participating nucleons. The results are compared to data from proton-antiproton collisions and Au + An collisions at lower RHIC energies. We find a significant change of the spectral shape between proton-antiproton and semi-peripheral Au + Au collisions. Comparing semi-peripheral to central Au + Au collisions, we find that the yields at high p(T) exhibit approximate scaling with the number of participating nucleons, rather than scaling with the number of binary collisions. (C) 2003 Published by Elsevier B.V.
引用
收藏
页码:297 / 303
页数:7
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