D^+→■~0π^+的衰变过程  

D^+→■~0π^+Decay

作　　者：张志宏[1] 王光怀[2] 刘晓静[2] 郭义庆[3] 

机构地区：[1]白城师范学院物理系,吉林省白城137000 [2]吉林师范大学物理学院,吉林省四平136000 [3]中国科学院高能物理研究所,北京100039

出　　处：《吉林大学学报（理学版）》2007年第3期444-447,共4页Journal of Jilin University:Science Edition

基　　金：吉林省教育厅自然科学基金(批准号:2006KJ323).

摘　　要：用光锥QCD求和规则计算D+→■-0π+衰变过程的强子矩阵元,包括领头阶因子化部分、αs修正的硬胶子和软胶子交换部分.计算结果表明,在D+→■-0π+衰变中,软胶子交换部分不能忽略.并计算了该衰变过程的分支比,计算结果与实验数据相符.We calculated systematically the hadronic matrix elements of D^＋ → K^-0 π^＋ decays with light cone QCD sum rules firstly, which included the contributions of factorization in the leading order, the hard gluon exchange in the next leading order, and the soft-gluon exchange in the power order. We can find that the contributions of soft-gluon exchange can not be neglected. Finally, we calculated the branching ratio of the decays, and the calculation results are 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：O571.32[理学—粒子物理与原子核物理]