D^0→K^-π^＋衰变过程研究  

D^0→K^-π^+ Decay Process

作　　者：吴向尧[1] 刘晓静[1] 王丽[1] 郭义庆[2] 

机构地区：[1]吉林师范大学物理学院,吉林四平136000 [2]中国科学院高能物理研究所,北京100049

出　　处：《原子能科学技术》2008年第7期586-589,共4页Atomic Energy Science and Technology

基　　金：吉林省教育厅自然科学基金资助项目(2006-076)

摘　　要：首次应用QCD因子化方法和光锥QCD求和规则系统计算D0→K-π+衰变过程的强子矩阵元,包括领头阶因子化部分、sα修正的硬胶子交换部分和软胶子交换部分。计算发现,在D0→K-π+衰变过程中,软胶子交换部分贡献相当大,甚至超过领头阶因子化部分以及sα修正的硬胶子交换部分的贡献。计算了该衰变过程的分支比,计算结果基本处在实验误差范围内。The hadronic matrix elements of D^0→K^-π^＋ decays concerned in the contributions of factorization in the leading order and the hard gluon exchange in as corrections as well as the contributions of soft gluon exchange were calculated with light cone QCD sum rules. It is found that the contributions of soft gluon exchange are noticeable, and exceed the contributions of factorization of leading order and the hard gluon exchange of αs corrections. The branching ratio of the decay was also calculated. The calculation result is in accordance with the experimental data.

关 键 词：D介子非轻子衰变 非因子化方法 强子矩阵元 分支比 

分 类 号：O56[理学—原子与分子物理]