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

• Published in: Chinese physics C Vol. 34; no. 1; pp. 22 - 27
• Main Author: 王宏民 侯召宇 刘家福 孙献静
• Format: Journal Article
• Language: English
• Published: IOP Publishing 2010; Physics Department, Academy of Armored Forces Engineering of PLA, Beijing 100072, China%Physics Graduate School, Shijiazhuang Railway Institute, Shijiazhuang 050043, China%Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049
• Subjects: RHIC; 吸收作用; 吸收效果; 实验数据; 相对论重离子碰撞; 能源中心; NRQCD model; x_F (or y)-dependence of absorption effect; shadowing
• ISSN: 1674-1137; 0254-3052; 2058-6132
• DOI: 10.1088/1674-1137/34/1/004

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.