Pseudorapidity Distributions of Charged Particles and Contributions of Leading Nucleons in Cu-Cu Collisions at High Energies

• 作者: 刘福虎 孙建新 王二琴
• 来源期刊: 中国物理快报(英文版)
• 学科: 物理学
• 关键词: 核子碰撞 带电粒子 理想气体模型 相互作用系统 赝快度分布 铜 高能 会费
• 年，卷（期）: 2010,（3）
• 页码范围: 108-111
• 页数: 4页
• 分类号: O571.413 O441
• 语种: 英文

摘要

The pseudorapidity distributions of charged particles produced in Cu-Cu collisions over an energy range from 22.4 GeV to 200 GeV are investigated by using a multi-source ideal gas model which contains systematically the contributions of leading nucleons. It is shown that the calculated results are in agreement with the experimental data and the model is successful in the description of the pseudorapidity distribution of charged particles. The contributions of leading nucleons increase with the increasing impact parameter. The cylinder length (the longitudinal shift of the interacting system) in rapidity space increases with the increasing energy and does not depend on centrality at a given energy.