2π干涉学分析的源空间参数

Spatial Parameter from Two-pion Interferometry

本文通过直接比较相应于不同密度分布源的关联函数,指出源的平均半径是2π干涉学分析中描述源空间线度的好物理量。比较不同关联函数分析获得的源空间参量时,选取源的平均半径为判别标准不仅优于Bartke和Kowalski提出的均方根半径,也优于Goldhaber等人提出的GGLP因子。对不同碰撞实验的2π干涉学结果的系统分析表明,使用我们提出的比较标准给出的结果更加合理。

It is proposed that the average radius of the Source obtained from twopion interferometry analyses is a suitable quantity to describe the spatial size of the source by comparing the correlation functions from different source density distributions directly. When comparing the source spatial parameters from different correlation functions, the average radius of the source is a superior standard parameter to the root-mean-square radius suggested by Bartke and Kowalski, and is superior to the factor suggested by Goldhaber et al. A systematic study of the results from different heavy ion experiments demonstrates that a more reasonable result can be obtained by utilizing the average radius as a standard for comparison.