CentralitydependenceofpTspectraforidentifiedhadronsinAu+AuandCu+Cucollisionsat（SNN）1/2=200GeV

被引：0

作者：

王云飞 ^{[1
]}

邵凤兰 ^{[1
]}

宋军 ^{[1
]}

魏德明 ^{[1
]}

谢去病 ^{[2
]}

机构：

[1] Department of Physics, Qufu Normal University

[2] Department of Physics, Shandong University

来源：

中国物理C | 2008年 / 12期

关键词：

relativistic high energy nucleus-nucleus collisions; nuclear modification factor; transverse collec- tive ?ow; quark combination model;

D O I：

暂无

中图分类号：

O571.6 [重离子核物理];

学科分类号：

0827 ; 082701 ;

摘要：

The centrality dependence of transverse momentum spectra for identified hadrons at midrapidity in Au+Au collisions at （SNN）1/2 = 200GeV is systematically studied in a quark combination model. The pT spectra of π±, K±, p（） and Λ（■） in different centrality bins and the nuclear modification factors （RCP） for these hadrons are calculated. The centrality dependence of the average collective transverse velocity β （r） for the hot and dense quark matter is obtained in Au+Au collisions, and it is applied to a relative smaller Cu+Cu collision system. The centrality dependence of pT spectra and the RCP for π0, Ks0 and Λ in Cu+Cu collisions at （SNN）1/2 =200 GeV are well described. The results show that β（r） is only a function of the number of participants Npart and it is independent of the collision system.

引用

页码：976 / 983

页数：8