Dependences of charged particle pseudorapidity distributions on impact parameter and center-of-mass energy in nucleus-nucleus collisions at relativistic energies

作者：Wang E Q; Chen Y H; Li B C; Liu F H^*

来源：Indian Journal of Physics and Proceedings of the Indian Association for the Cultivation of Science, 2013, 87(8): 793-801.

DOI：10.1007/s12648-013-0297-1

• Pseudorapidity distribution
• Dependence
• Four-component Landau model

The centrality and rapidity dependence of charged particles over a wide range of center-of-mass energy are analyzed. In this framework of participant-spectator model, the interacting system of nucleus-nucleus collisions at relativistic energies is divided into four parts (sources): target spectator, target participant, projectile participant and projectile spectator. Each source is treated by using a revised Landau model. The pseudorapidity distributions calculated by four-component Landau model are found to be in agreement with experimental data of the PHOBOS and ALICE collaborations. The distribution height is mainly determined by effective nucleon number and center-of-mass energy; and the distribution width being measured by the revised width in the Landau model and the sources rapidity shifts. Furthermore, we have found two empirical relations for projectile-participant and projectile-spectator (pseudo)rapidity as functions of the center-of-mass energy.

• 出版日期2013-8
• 单位山西大学