科研之友
微信
新浪微博
Facebook
分享链接
摘要
Target excitation dependence of fluctuation of produced pions (i.e. classifying data of the fluctuation pattern on pions on the basis of the number of gray tracks) is studied for nucleus-nucleus collisions at different projectile energies. In each set the experimental multiplicity distribution is compared with the negative binomial distribution (NBD), which is found to describe the experimental distribution quite well. Target excitation dependence is studied in respect of the clan model parameters (n) over bar (c) and (N) over bar, which are extracted from the NBD fit parameters (n) over bar and k. A detailed comparison between different interactions at the same energy and the same interactions at different energies is also drawn. A nonmonotonic dependence of D-2/(n) over bar on < n(g)> is revealed, which is also a characteristic of multiplicity fluctuations at RHIC data.
- 出版日期2010-3-20
