D_s→φπ的理论分析(英文)  

Analysis of D_s→φπ Beyond Naive Factorization

作　　者：宫海军[1] 孙俊峰[1] 杜东生[1] 

机构地区：[1]中国科学院高能物理研究所,北京100039

出　　处：《高能物理与核物理》2002年第7期665-671,共7页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 ( 1 9835 6 0A)资助~~

摘　　要：在重夸克极限下 ,用QCD因子化方法分析Ds→π的衰变 .讨论了硬旁观者散射等非因子化贡献 ,并给出了数值结果 ,理论预言的分支比与实验相符 .最后 ,结合D0 →K π的测量值 。We analyze the decay D s→π with QCD factorization in the heavy quark limit. The nonfactorizable contributions,including hard spectator contribution,are discussed and numerical results are presented. Our predictions on the branching ratio of the decay are in agreement with the experiment. We also use a pure phenomenological method to estimate the branching ratio for D s→π with the existing D 0→ K *π data.

关 键 词：QCD因子化 非因子化贡献 理论分析 纯惟象 重夸克极限 分支比 粒子衰变 

分 类 号：O572.3[理学—粒子物理与原子核物理]