The dependence of J/ψ-nucleon inelastic cross section on the Feynman variable

DUAN Chun-Gui; LIU Na; MIAO Wen-Dan

doi:10.1088/1674-1137/35/9/002

Chinese Physics C> 2011, Vol. 35> Issue(9) : 804-807 DOI: 10.1088/1674-1137/35/9/002

The dependence of J/ψ-nucleon inelastic cross section on the Feynman variable

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By means of two typical sets of nuclear parton distribution functions, meanwhile taking account of the energy loss of the beam proton and the nuclear absorption of the charmonium states traversing the nuclear matter in the uniform framework of the Glauber model, a leading order phenomenological analysis is given in the color evaporation model of the E866 experimental data on J/ψ production differential cross section ratios R_Fe/Be(x_F). It is shown that the energy loss effect of beam proton on R_Fe/Be(x_F) is more important than the nuclear effects on parton distribution functions in the high Feynman variable x_F region. It is found that the J/ψ-nucleon inelastic cross section depends on the Feynman variable x_F and increases linearly with x_F in the region x_F>0.2.

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DUAN Chun-Gui, LIU Na and MIAO Wen-Dan. The dependence of J/ψ-nucleon inelastic cross section on the Feynman variable[J]. Chinese Physics C, 2011, 35(9): 804-807. doi: 10.1088/1674-1137/35/9/002

DUAN Chun-Gui, LIU Na and MIAO Wen-Dan. The dependence of J/ψ-nucleon inelastic cross section on the Feynman variable[J]. Chinese Physics C, 2011, 35(9): 804-807. doi: 10.1088/1674-1137/35/9/002 shu

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Received: 2010-11-30
Revised: 2010-12-07

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

The dependence of J/ψ-nucleon inelastic cross section on the Feynman variable

Corresponding author: DUAN Chun-Gui,

Received Date: 2010-11-30

Accepted Date: 2010-12-07

Available Online: 2011-09-05

Abstract: By means of two typical sets of nuclear parton distribution functions, meanwhile taking account of the energy loss of the beam proton and the nuclear absorption of the charmonium states traversing the nuclear matter in the uniform framework of the Glauber model, a leading order phenomenological analysis is given in the color evaporation model of the E866 experimental data on J/ψ production differential cross section ratios R_Fe/Be(x_F). It is shown that the energy loss effect of beam proton on R_Fe/Be(x_F) is more important than the nuclear effects on parton distribution functions in the high Feynman variable x_F region. It is found that the J/ψ-nucleon inelastic cross section depends on the Feynman variable x_F and increases linearly with x_F in the region x_F>0.2.

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The dependence of J/ψ-nucleon inelastic cross section on the Feynman variable

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