Nonfactorizable B→xc0K Decay and QCD Factorization

作     者：MENG Ce~1 GAO Ying-Jia~1 CHAO Kuang-Ta~(1,2)1 Department of Physics,Peking University,Beijing 100871,China2 China Center of Advanced Science and Technology (World Laboratory),Beijing 100080,China 

出 版 物：《Communications in Theoretical Physics》 (理论物理(英文版))

年 卷 期：2007年第48卷第11期

页      面：885-890页

核心收录：

学科分类：07[理学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：The project supported in part by National Natural Science Foundation of China under Grant Nos.10421503,10675003 the Key Grant Project of Ministry of Education under Grant No.305001 

主　　题：B meson decay QCD factorization charmonium 

摘      要：We study the unexpectedly large rate for the factorization-forbidden decay B→xK within the QCDfactorization *** use a non-zero gluon mass to regularize the infrared divergences in vertex ***-point singularities arising from spectator corrections are regularized and carefully estimated by the off-shellness *** find that the contributions arising from the vertex and leading-twist spectator corrections are numericallysmall,and the twist-3 spectator contribution with chiral enhancement and linear end-point singularity becomes *** reasonable choices for the parameters,the branching ratio for B→xK decay is estimated tb be in the range(2～4)×10,which is compatible with the Belle and BaBar data.