Drell-Yan dilepton production in relativistic heavy-ion collisions at RHIC  

作　　者：冯秀梅 张本威 

机构地区：[1]College of Physics Science & Technology,Central China Normal University [2]Key Laboratory of Quark & Lepton Physics(Central China Normal University),Ministry of Education

出　　处：《Chinese Physics C》2011年第9期829-832,共4页中国物理C（英文版）

基　　金：Supported by Ministry of Education of China with Program (NCET-09-0411);National Natural Science Foundation of China(11075062);CCNU (CCNU09A02001)

摘　　要：We investigate the lepton pair production with the Drell-Yan process in relativistic heavy ion collisions by computing the double differential cross section dσ/dM2dy and dσ/dM2dxF at the next-to-leading order in p＋Au and Au＋Au collisions with √SNN = 200 GeV at RHIC. The resulting nuclear modification factors RpAu and RAuAu show strong sensitivity to the cold nuclear matter （CNM） effects and could probe the CNM effects at a very wide region of the longitudinal momentum fraction x. The variation of R with the invariant mass M, the rapidity y and the Feynman variable XF is shown and we find that the nuclear modification factor for the double differential cross section could be smaller than 0.4 in some kinematic regions of high-energy nucleus-nucleus reactions at RHIC.We investigate the lepton pair production with the Drell-Yan process in relativistic heavy ion collisions by computing the double differential cross section dσ/dM2dy and dσ/dM2dxF at the next-to-leading order in p＋Au and Au＋Au collisions with √SNN = 200 GeV at RHIC. The resulting nuclear modification factors RpAu and RAuAu show strong sensitivity to the cold nuclear matter （CNM） effects and could probe the CNM effects at a very wide region of the longitudinal momentum fraction x. The variation of R with the invariant mass M, the rapidity y and the Feynman variable XF is shown and we find that the nuclear modification factor for the double differential cross section could be smaller than 0.4 in some kinematic regions of high-energy nucleus-nucleus reactions at RHIC.

关 键 词：Drell-Yan process heavy-ion collisions cold nuclear matter effects 

分 类 号：O571.6[理学—粒子物理与原子核物理] TL81[理学—物理]