核束缚能效应和部分子间相互演化对平均核结构函数的影响

把束缚核子内海克从物理上分为两部分：一部分是伴随价夸克受核束缚效应影响的云海夸克，另一部分是能摆脱核子的要票才而逃逸到核环境中的背景海夸克。首先，给出了核束缚效应对核内束缚核子中价夸克、云海夸克及相应胶子的纵向动量几率分布函数的最低级修正形式；借助核动量守恒条件定出了背景海夸克及相应胶子的动量几率分布函数，根据部分子内禀横向动量分布与动量分布间的制约关系及我们关于核环境中部分子间相互演化的观点，建

The Effect of Nuclear Binding and Parton Evolution on the Average Nuclear Structure Function

In this paper,we separate sea quarks in bound nucleon into two parts:one part,which is affected by the nuclear binding effect together with valence quark, is called cloud sea quark;another part,which can get rid of the confinment of nucleons and go into the nuclear medium, is called background sea quark.Firstly,we give the lowest order modification of the nuclear binding effect to longitudinal momentum distributions of valence quarks,cloud sea quarks and corresponding gluons and determine the momentum distributions of background sea quarks and corresponding gluons by using the condition of momentum conservation.And then we set up the self-consistent integral equations for the parton distributions in bound nucleons that determine the average nuclear structure function according to the constraint interrelationship between the intrinsic tansverse momentum and longitudinal momentum distributions and our previous view point of parton evolution in the nuclear mediun and obtain the numerical solution of these equtions in the successive substitution method.Finally,the obtained parton distributions in bound nucleons are applied to explain the EMC effect and expect the nuclear Drell-Yan ratio without any free parameter,the result is satisfactory.