钙核与钙核碰撞的K因子  

On K-factor's for the process in Calcium-Calcium nuclear collision

作　　者：郑乔[1] 侯召宇[2] 

机构地区：[1]石家庄铁道学院基础部,石家庄050043 [2]石家庄师范专科学校物理系,石家庄050801

出　　处：《河北省科学院学报》2001年第1期6-11,共6页Journal of The Hebei Academy of Sciences

基　　金：河北省自然科学基金项目资助 (19715 0 )

摘　　要：在高能核碰撞Drell Yan过程考虑湮灭项和康普顿散射项的基础上 ,利用双重Q2 重标度模型 ,计算了钙核与钙核的碰撞。结果表明 ,对于不同的x1值 ,K因子随x2 的变化很不相同 ,它不能近似地作为常数。The double Q2-rescaling model is used to compute the cha ng e of K-factor with x 2 when the nucleus calcium-nucleus calcium colli sion occurs at different values of x 1,where x are momentum fraction va riables.In the calculation,the contributions of annihilations and Compton scattering have been considered for the Drell-Yan process.The calculated results show that the plots of K-fact or versus x 2 are very different for different values of x 1 .They are also compared with experimental data,which provides a test to model of nuclear effect and the QCD theory itself.

关 键 词：DRELL-YAN过程 双重Q^2-重标度模型 K因子 高能核碰撞 钙核 QCD理论 

分 类 号：O572[理学—粒子物理与原子核物理]