熵指数对多重数分布的宽度和形状的依赖性(英文)  

Dependence of Entropy Index on the Width and Shape of Multiplicity Distributions

作　　者：张绘蓝[1] 刘连寿[1] 

机构地区：[1]华中师范大学粒子物理研究所,武汉430079

出　　处：《高能物理与核物理》2003年第9期803-807,共5页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 (90 10 3 0 19)资助~~

摘　　要：通过运用蒙特卡罗方法 ,研究了熵指数对多重数分布的宽度和形状的依赖性 ,并和NA2 2实验结果作比较 .发现 ,熵指数对多重数分布的形状变化不敏感 ,但是却随着分布宽度的增加而减小 .The dependence of entropy index μ 2 on the width and shape of multiplicity distributions are studied in detail by using Monte Carlo method and comparing with the results from NA22 experiment.It is found that the entropy index is insensitive to the shape of multiplicity distribution but decreases with the increase of the distribution width.The latter observation contradicts the usually expected role of the index,indicating that μ q is not an appropriate parameter for measuring event-by-event fluctuation.

关 键 词：反常无规性 事件空间起伏 熵指数 多重数分布 宽度 形状 依赖性 蒙特卡罗方法 粒子物理 

分 类 号：O572.21[理学—粒子物理与原子核物理]