高能Au+Au碰撞末态多重数赝快度分布研究  

Charged-particle pseudorapidity distributions in Au+Au collisions at high energy

作　　者：王增伟[1] 姜志进[1] 张裕仕[2] 

机构地区：[1]上海理工大学理学院,上海200093 [2]枣庄学院物理与电子工程系,枣庄277160

出　　处：《上海理工大学学报》2009年第4期322-326,共5页Journal of University of Shanghai For Science and Technology

基　　金：上海市重点学科建设资助项目(530501)

摘　　要：利用Glauber模型,计算出核-核碰撞中的参与者数、旁观者数及二元核子-核子碰撞数.考虑到能量损失和旁观者效应对末态带电粒子赝快度分布的影响,通过对核子-核子碰撞快度分布的逐次叠加得到核-核碰撞末态带电粒子的赝快度分布.并用其讨论了PHOBOS合作组在高能Au+Au碰撞所做的实验测量.理论与实验结果符合得很好.Using the Glauber model,the numbers of participants,spectators and as well as the number of binary nucleon-nucleon collisions were calculated in high-energy heavy-ion collisions.The pseudorapidity distributions of charged particles in nucleus-nucleus collisions was obtained by repeated addition of the rapidity distribution of nucleon-nucleon collision with consideration of the effect of energy loss and spectator particle influence.The theoretical results agree well with those of the experimental measurements of Au＋Au collisions at high energy level carried out by PHOBOS Collaboration.

关 键 词：GLAUBER模型 赝快度分布 二元核子-核子碰撞数 旁观者数 

分 类 号：O572.2[理学—粒子物理与原子核物理]