【摘要】 在微扰ＱＣＤＯ（αｓ）领头阶对数近似下，采用双重Ｑ２重标度模型，计算了ＰＡ碰撞Ｄｒｅｌ－Ｙａｎ过程Ｋ因子，并与ＰＮ碰撞Ｄｒｅｌ－Ｙａｎ过程Ｋ因子进行比较．计算结果表明Ｋ因子对核质量数Ａ有很强的依赖性，且在ｘＡ＜０．１区域，随ｘＡ的减小核效应越显著．与未来实验相对照，可以检验所用的核效应理论模型及微扰ＱＣＤ理论更多还原

【Abstract】 In the term of perturbative QCD and O (α s)’s leading order logarithmic approximate,by useing double Q 2 rescaling model, K factor of Drell Yan process in P A collision is calculated and compared with the counterpart of P N collision.It shows that K factor depends strongly on nucleon number A , and in the range of x A <0.1,nuclear effect become more clear with x A become small.Compared with the funture experiments,the theory nuclear effect model that we have used and perturbative QCD may be examed.更多还原