夸克质量对正负电子湮灭中单举过程的影响  

Effect of Quark Mass for the Exclusive Process in e^+e^- Annihilation

作　　者：王丽芝[1] 祁烁[1] 刘魁勇[2] 杨坤[1] 成泰民[1] 

机构地区：[1]沈阳化工学院数理系,辽宁沈阳110142 [2]辽宁大学物理系,辽宁沈阳110036

出　　处：《南京师大学报（自然科学版）》2008年第4期66-68,共3页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：国家自然科学基金(10647138);辽宁省教育厅科学技术研究基金(20060667)资助项目

摘　　要：在3种方案下考虑夸克质量改变对正负电子湮灭中双粲夸克对的单举过程的影响.第一种方案,选取固定长程矩阵元;第二种方案,采用线性势模型计算长程矩阵元;第三种方案,由实验抽取长程矩阵元.发现随夸克质量的减小,单举过程的截面有显著增大.The effect of quark mass for the exclusive process in e ^＋ e ^- annihilation is investigated under three scenarios. The first scenario, the fixed long-distance matrix was chosen. The second scenario, the fixed long-distance matrix was calculated through linear potential model. The third scenario, the fixed long-distance matrix was extracted from the experimental data. The cross section of the exclusive processes was found increased significantly with the quark mass decreasing.

关 键 词：非相对论量子力学 粲夸克偶素 单举过程 

分 类 号：O412[理学—理论物理]