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| 核Drell-Yan过程与部分子分布的不均匀性 | |
| 引用本文： | 刘植凤,段春贵,苗文丹,谢革英.核Drell-Yan过程与部分子分布的不均匀性[J].河北师范大学学报(自然科学版),2007,31(1):50-55. |
| 作者姓名： | 刘植凤 段春贵 苗文丹 谢革英 |
| 作者单位： | 1. 石家庄经济学院,地动所,河北,石家庄,050000 2. 河北师范大学,物理科学与信息工程学院,河北,石家庄,050016 3. 河北建筑工程学院,数理系,河北,张家口,075000 |
| 摘 要： | 通过p-A碰撞的核Drell-Yan过程研究了核遮蔽效应及其空间相关性.对末态轻子对的观测反映了相互作用点的情况.计算了能量为800 GeV的质子打击Ca,W,Au核的Drell-Yan过程与p-p碰撞Drell-Yan过程的微分截面比.研究发现,在考虑部分子分布的空间依赖性后,核Drell-Yan的截面会有显著变化.计算结果与未来精确测量p-A碰撞核Drell-Yan过程的实验数据比较,能够定量地验证部分子分布函数的空间依赖性. |
| 关 键 词： | 核遮蔽效应因子 核Drell-Yan过程 部分子分布的空间依赖性 |
| 文章编号： | 1000-5854(2007)01-0050-06 |
| 修稿时间： | 2006-01-04 |
Nuclear Drell-Yan Process and Spatial Dependence of Parton Distribution Functions |
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| LIU Zhi-feng,DUAN Chun-gui,MIAO Wen-dan,XIE Ge-ying.Nuclear Drell-Yan Process and Spatial Dependence of Parton Distribution Functions[J].Journal of Hebei Normal University,2007,31(1):50-55. | |
| Authors: | LIU Zhi-feng DUAN Chun-gui MIAO Wen-dan XIE Ge-ying |
| Institution: | 1. Institute of Earthquake,Shijiazhuang University of Eeonomics,Hebei Shijiazhuang 050000,China; 2. College of Physics Science and Information Engineering,Hebei Normal Uriversity,Hebei Shijiazhuang 050016,China; 3. Department of Mathematical Physics,Hebei Institute of Architecture and Civil Engineering,Hebei Zhangjiakou 075000,China |
| Abstract: | The nuclear shadowing effect and its position dependence are studied by the p-A DrellYan process.The nuclear DrellYan process can be used to study the spatial dependence of parton distribution functions.The dileptons produced in Drell-Yan process don't interact with other partons in the nuclear.Therefore,the final-states dileptons can infer the information of local partons.Considering the spatial dependence of parton distribution functions,the p-A DrellYan cross-section can be written as follows.With two kinds of spatial dependent shadowing parameterizations given in literature:the Drell-Yan cross-section ratios for an 800*!GeV proton beam incident on p,Ca,W and Au are calculated.It is found that,considering the spatial dependence of parton distribution functions,the cross-section of nuclear DrellYan process changes significantly.By Comparing our result with the future precise data measured in Drell-Yan process,the spatial dependent parton distribution functions can be examined. |
| Keywords: | nuclear shadowing effect parameter nuclear Drell-Yan process spatial dependence of parton distribution functions |
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