粒子高阶集合流关联Monte Carlo模拟与实验分析  

MONTE CARLO SIMULATION AND EXPERIMENTAL ANALYSES OF HIGH-ORDER COLLECTIVE-FLOW CORRELATIONS BASED ON CORRELATIVE DEGREE

作　　者：张伟刚[1] 董孝义[1] 赵启大[1] 

机构地区：[1]南开大学现代光学研究所

出　　处：《南开大学学报（自然科学版）》2002年第2期1-5,共5页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：广西自然科学基金 ( 981 1 0 1 6 )

摘　　要：关联度是描述集合流性质并与集合流的强度与集体性同等重要的新参量 .本文基于关联度概念 ,建立了方位角高阶关联、横向动量模高阶关联和横向高阶关联的 Monte Carlo模拟方法 .采用粒子群关联函数 ,对 Bevalac流光室 2 .1 A Ge V Ne+ Na F实验事件的高阶集合流关联效应进行了 Monte Carlo模拟与实验对比分析 。The correlative degree is a new parameter that can describe the properties of collective flow, which is as important as the intensity and the collectivity of the collective flow. Based on the concept of correlative degree, new method of Monte Carlo simulation have been constructed, with which high-order correlations of the azimuthal angle, the high-order correlations of transverse momentum magnitude and the transverse high-order correlations can be analyzed, respectively. Using the method of particle group correlation function, the effects of the high-order collective-flow correlations are analyzed with the 4π experimental events for 2.1A GeV Ne+NaF collisions at the Bevalac stream chamber by means of comparing the Monte Carlo simulative events with the experimental events. Three kinds of the correlative intensities of the high-order collective-flow have been inferred quantifatively for the experimental events.

关 键 词：关联度 高阶关联 集合流 集体性 MONTE CARLO模拟 

分 类 号：O57[理学—粒子物理与原子核物理]