Zhenmin He1,2 - Xiaoxia Yao1,2 - Chungui Duan1,2 - Guanglie Li1,3 - Hongan Peng1, 4
1 CCAST (World Laboratory) P.O.Box 8730, Beijing, 100080,
2 Physics Department, Hebei Teachers' University, Shijiazhuang, 050016, P.R. China
3 Institute of High Energy Physics, Academia Sinica, Beijing, 100039, P.R. China
4 Physics Department, Peking University, Beijing,100871, P.R. China
Received: 18 August 1997 / Published online: 20 February 1998
In order to overcome the shortcoming of nonconservation of nuclear momentum existing in the original Q2-rescaling model (OQ2RM) and avoid introducing nuclear shadowing factor, we proposed a double Q2-rescaling model (DQ2RM) 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 Q2-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 photoproduction process are consistently and quite satisfactorily explained.