B~*介子两体弱衰变中D介子对产生的研究  

The production of the D meson pair associated with the two-body B~* weak decay

作　　者：杨悦玲 高洁 李海燕 卢飞翔 郭育培 Yang Yueling;Gao Jie;Li Haiyan;Lu Feixiang;Guo Yupei(College of Physics and Materials Science, Henan Normal University, Xinxiang 453007, China)

机构地区：[1]河南师范大学物理与材料科学学院,河南新乡453007

出　　处：《河南师范大学学报（自然科学版）》2018年第1期45-49,共5页Journal of Henan Normal University(Natural Science Edition)

基　　金：国家自然科学基金(U1632109;11705047;11547014);河南师范大学博士启动课题(QD14205)

摘　　要：采用微扰QCD方法,对基态矢量介子B_q~*通过弱相互作用衰变到末态是2个D介子的过程进行了唯象研究.结果表明,对于未被CKM因子压低的W玻色子外发射过程B_s^(*0)→D_s^+D_s^-,B_d^(*0)→D_s^+D_d^-,B_u^(*+)→D_s^+_u^0等,其分支比可以达到10^(-9)量级.这些过程很有可能在未来被大型强子对撞机LHC和超级B工厂SuperKEKB等实验探测到.In this paper,the two body weak decays of the ground vector B*meson into the D meson pair are investigated with the perturbative QCD approach.It shows that the CKM allowed processes,such as the B*0s→D+sD-s,B*0d→D+sD-d,B*+u→D+u0u decays,which are mainly induced by the external W emission interactions,can have the branching ratio of10-9.These processes might be promisingly accessible to the LHC and SuperKEKB experiments in the near future.

关 键 词：B*介子 微扰QCD方法 分支比 

分 类 号：O572.2[理学—粒子物理与原子核物理] O413[理学—物理]