xF (or y)-Dependence of Nuclear Absorption and Energy Loss Effects on J/ψ Production |
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作者姓名: | WANG Hong-Min SUN Xian-Jing ZHANG Ben-Ai |
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作者单位: | [1]physics Department, Academy of Armored Forces Engineering of PLA, Beijing 100072, China [2]Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China [3]Institute of Applied Physics and Computation Mathematics, Beijing 100088, China |
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摘 要: | By means of the nuclear parton distribution studied only with lepton deep-inelastic scattering experimental data, the J/ψ "normal nuclear absorption" and energy loss effects are studied in a GIauber formalism at HERA and RHIC energies. Assuming that the absorption cross section σabs increases with the charmonium-nucleon center of mass energy, the results reveal a significant dependence of the aabs on rapidity g at RHIC energies. The initial-state energy loss effect, which is found important only at HERA energies, is also considered, and its influence should be eliminated when we studied the absorption effect at low collision energies. Finally, we also present the theoretical prediction for LHC.
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关 键 词: | 能量损失 吸收截面 生产 RHIC HERA 非弹性散射 实验数据 形式主义 |
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