核Drell—Yan过程中的能量损失效应  

The Engergy Loss in Dreil-Yan Process

作　　者：宋丽华[1] 莫文玲[1] 

机构地区：[1]河北理工大学信息学院,河北唐山063009

出　　处：《河北理工学院学报》2006年第4期114-118,共5页Journal of Hebei Institute of Technology

摘　　要：核Drell-Yan过程中的能量损失效应是不同于束缚核子部分子分布函数核效应的另外一种核效应。用G．T．Garvey和T．C．Peng提出的处理能量损失的方法分别计算了入射质子束能量E_(beam)为120 GeV,50 GeV的(p+W)/(p+D)的Drell-Yan微分截面比,对核Drell-Yan过程中的能量损失值与入射夸克在A核中的平均路径长度〈L〉_A的关系进行了讨论,提出用低能量的质子束、对核子数A为不同值的多种核子进行实验来进一步研究能量损失效应的建议。The energy loss of partons in nucler matter is another nuclear effect, apart from the nuclear effect on the parton distribution in deep - inelastic scattering process. In our paper, employing a clear idea of quark energy loss in the nuclear medium presented by G. T. Garvey and J. C. Peng in their article, we measure the Drell - Yan production cross section ratios on W to D at 120 GeV and 50 GeV ineent proton beams,discuss the dependence of energy loss rate on patton path length 〈 L 〉 A, and present the prospects of using relatively low energy proton beams and several targets of differing A.

关 键 词：核DRELL-YAN过程 能量损失效应 部分子分布函数 

分 类 号：O572.25[理学—粒子物理与原子核物理]