DOI 10.1007/s100529800756
Double Q2-rescaling model and the nuclear
effect
of
the parton distribution functions
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,
P.R. China
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
Abstract
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.
Copyright Springer-Verlag
