J/ψ-N center of mass energy dependence of nuclear absorption effect on J/ψ production

作     者：王宏民 侯召宇 刘家福 孙献静 

作者机构：Physics Department Academy of Armored Forces Engineering of PLA Physics Graduate School Shijiazhuang Railway Institute Institute of High Energy Physics Chinese Academy of Sciences 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2010年第34卷第1期

页      面：22-27页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：Supported by Natural Science Foundation of Hebei Province (A2008000421) 

主　　题：x F (or y)-dependence of absorption effect NRQCD model shadowing 

摘      要：In this paper, the J/ψ nuclear absorption effect is studied at RHIC and LHC energies with the EKS98 shadowing parameterizations. By assuming that the J/ψ absorption cross section, σ abs , increases with the charmonium-nucleon （J/ψ-N） center of mass energy, s J/ψN , it is found that σ abs should depend on x F （or y） at a certain center of mass energy per nucleon pair,s , especially at LHC energies. The theoretical results with the x F （or y）-dependence of the absorption effect are in good agreement with the experiment data from PHENIX in d-Au collisions and the predicted results will be examined by the forthcoming experimental data from LHC in d-Pb collisions. Finally, we also present baseline calculations of cold nuclear matter effects on J/ψ production in nucleus-nucleus （A-A） collisions and find that the x F （or y）-dependence of absorption effect is very small at both RHIC and LHC energies in A-A collisions.