158 A GeV Pb+Pb反应中多粒子产生的双源统计模型分析  

Analysis of Multi-Particle Production in 158 A GeV Pb+Pb Collisions by Two-Source Statistical Model

作　　者：陆中道[1] 萨本豪[1] Amand Faessler C.Fuchs E.E.Zabrodin 

机构地区：[1]中国原子能科学研究院 [2]Institute for The oretical Physics,University of Tuebingen

出　　处：《高能物理与核物理》2002年第5期501-506,共6页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 ( 1 9975 0 75 );兰州重离子加速器国家实验室核理论基金资助~~

摘　　要：提出双源统计模型并用它研究了 1 58AGeVPb +Pb反应中多粒子产生 .模型很好地描述了实验 ,同时给出一个合理清晰的物理图像 .反应系统由一个热而小的内源和一个大而较凉的外源构成 .外源具有类弹和类靶特征 ,内源具有反应中心区特征 .在freeze out时系统仍处于膨胀中 .The data of multi-particle production in 158 A GeV Pb + Pb collisions are analyzed by two-source statistical model. The model calculations fit the experimental data very well and supply a reasonable and clear physical picture. The reaction system is composed of a hot, small inner source and a big, cool outer source. The outer source characterizes the projectile-like and target-like, and the inner source characterizes the central reaction zone. At freeze-out, the system is still in expanding.

关 键 词：统计模型 双源 多粒子产生 强相互作用 夸克-胶子-等离子体 相对重离子碰撞 QGP 双源统计模型 

分 类 号：O572.21[理学—粒子物理与原子核物理]