核靶对Drel-Yan过程K因子的影响  

Nucleon Target's Effect to K Factor of Drell Yan Process

作　　者：段春贵[1] 刘春秀[1] 张玉敏[1] 阎占元[1] 

机构地区：[1]河北师范大学物理系

出　　处：《河北师范大学学报（自然科学版）》1999年第1期48-53,66,共7页Journal of Hebei Normal University：Natural Science

基　　金：河北省自然科学基金

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。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.

关 键 词：DRELL-YAN过程 核效应 K因子 P-A碰撞 核靶 

分 类 号：O571.4[理学—粒子物理与原子核物理]