Statistical Model for Partons in Nucleon, EMC Effect and Gluon Distribution Functions of Nucleon Inside Nuclei

Li Zibang; Peng Hongan

Chinese Physics C> 1988, Vol. 12> Issue(S2) : 165-174

Statistical Model for Partons in Nucleon, EMC Effect and Gluon Distribution Functions of Nucleon Inside Nuclei

Li Zibang ¹ ,
Peng Hongan ²

1 Liaoning Normal University
2 Peking University

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Assuming a nucleon as a thermodynamical system composed of partons (quarks and gluons), We discussed its temperature and chemical potential. We also derived the relations between the fractional momentum x distribution of the partons in nucleon and its corresponding statistical distribution. By analogy of the gluons in nucleon with the photons in the black-body, we calculated the effective temperature of the nucleon. Assuming the chemical potential of u, d quark to be the same and setting the reasonable values, we determined the variations of the temperature of nucleon in nucleus by using rescaling scheme. Thus, statistical model could explain the EMC effect quite well. If the chemical potential of gluons is small and negative, the statistical model can also explain the "largeness" of the ratio of the giuon distribution between bounded nucleon and free nucleon in the virtual photoprcxiuction process of J/ψ in the small x region.

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Li Zibang and Peng Hongan. Statistical Model for Partons in Nucleon, EMC Effect and Gluon Distribution Functions of Nucleon Inside Nuclei[J]. Chinese Physics C, 1988, 12(S2): 165-174.

Li Zibang and Peng Hongan. Statistical Model for Partons in Nucleon, EMC Effect and Gluon Distribution Functions of Nucleon Inside Nuclei[J]. Chinese Physics C, 1988, 12(S2): 165-174. shu

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Received: 1986-09-08

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The project supported by National Natural Science Foundation of China

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Statistical Model for Partons in Nucleon, EMC Effect and Gluon Distribution Functions of Nucleon Inside Nuclei

Li Zibang ^1,
Peng Hongan ^2,

1 Liaoning Normal University
2 Peking University

Received Date: 1986-09-08

Fund Project: The project supported by National Natural Science Foundation of China

Abstract: Assuming a nucleon as a thermodynamical system composed of partons (quarks and gluons), We discussed its temperature and chemical potential. We also derived the relations between the fractional momentum x distribution of the partons in nucleon and its corresponding statistical distribution. By analogy of the gluons in nucleon with the photons in the black-body, we calculated the effective temperature of the nucleon. Assuming the chemical potential of u, d quark to be the same and setting the reasonable values, we determined the variations of the temperature of nucleon in nucleus by using rescaling scheme. Thus, statistical model could explain the EMC effect quite well. If the chemical potential of gluons is small and negative, the statistical model can also explain the "largeness" of the ratio of the giuon distribution between bounded nucleon and free nucleon in the virtual photoprcxiuction process of J/ψ in the small x region.