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Double \(Q^2\)-rescaling model and the nuclear effect of the parton distribution functions

  • Zhenmin He
  • Xiaoxia Yao
  • Chungui Duan
  • Guanglie Li
  • Hongan Peng
Theoretical physics
  • 27 Downloads

Abstract.

In order to overcome the shortcoming of nonconservation of nuclear momentum existing in the original \(Q^2\)-rescaling model (O\(Q^2\)RM) and avoid introducing nuclear shadowing factor, we proposed a double \(Q^2\)-rescaling model (D\(Q^2\)RM) for the parton distributions of the bound nucleon. Using the experimental data of lepton-nucleus deep inelastic scattering (DIS) and the condition of the nuclear momentum conservation, the \(Q^2\)-rescaling parameters of various partons for Sn, Fe, Ca and C nuclei are determined. The rescaling parameters of valence quark distributions are larger than unity and gradually increase with atomic number A, on the contrary, the rescaling parameters of sea quark distributions and gluon distributions are smaller than unity, and slowly decrease with A. By using this model, the experimental data of the DIS process, the nuclear Drell-Yan process and \(J/\psi\) ph otoproduction process are consistently and quite satisfactorily explained.

Keywords

Experimental Data Distribution Function Atomic Number Inelastic Scattering Momentum Conservation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • Zhenmin He
    • 1
  • Xiaoxia Yao
    • 1
  • Chungui Duan
    • 1
  • Guanglie Li
    • 1
  • Hongan Peng
    • 1
  1. 1. CCAST (World Laboratory) P.O.Box 8730, Beijing, 100080, P.R. China CN

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