Pseudorapidity Distributions of Charged Particles and Contributions of Leading Nucleons in Cu-Cu Collisions at High Energies
Pseudorapidity Distributions of Charged Particles and Contributions of Leading Nucleons in Cu-Cu Collisions at High Energies
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DOI：
10.1088/0256-307x/27/3/032503
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发表时间：
2010-03
影响因子：
3.5
通讯作者：
Jian-xin Sun;Fu-Hu Liu;E. Wang
中科院分区：
文献类型：
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作者：
Jian-xin Sun;Fu-Hu Liu;E. Wang
利用多源理想气体模型，研究了22.4 ~ 200gev能量范围内Cu-Cu碰撞产生的带电粒子的赝快度分布。计算结果与实验数据吻合较好，该模型成功地描述了带电粒子的赝快度分布。前导核子的贡献随冲击参数的增大而增大。圆柱长度（相互作用体系的纵向位移）随能量的增加而增加，而不依赖于给定能量下的中心性。
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.