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

WANG Hong-Min; HOU Zhao-Yu; LIU Jia-Fu; SUN Xian-Jing

doi:10.1088/1674-1137/34/1/004

Chinese Physics C> 2010, Vol. 34> Issue(1) : 22-27 DOI: 10.1088/1674-1137/34/1/004

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

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Abstract：
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/ψ N}, 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.

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WANG Hong-Min, HOU Zhao-Yu, LIU Jia-Fu and SUN Xian-Jing. J/ψ-N center of mass energy dependence of nuclear absorption effect on J/ψ production[J]. Chinese Physics C, 2010, 34(1): 22-27. doi: 10.1088/1674-1137/34/1/004

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Received: 2009-02-01
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沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author: WANG Hong-Min,

Received Date: 2009-02-01

Accepted Date: 2009-03-16

Available Online: 2010-01-05

Abstract:

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/ψ N}, 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.

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

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