J/ψ-N center of mass energy dependence of nuclear absorption effect on J/ψ production
- Received Date: 2009-02-01
- Accepted Date: 2009-03-16
- Available Online: 2010-01-05
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, σabs, increases with the charmonium-nucleon (J/ψ-N) center of mass energy, √sJ/ψ N, it is found that σabs should depend on xF (or y) at a certain center of mass energy per nucleon pair, √s, especially at LHC energies. The theoretical results with the xF (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 xF (or y)-dependence of absorption effect is very small at both RHIC and LHC energies in A-A collisions.