pQCD因子化方法计算B介子三体非轻衰变  

Study of the B meson Three-body Non-leptonic Decays with pQCD Approach

作　　者：杨红 Yang Hong(School of Physical Science and Technology,Southwest University,Chongqing 400700,China)

机构地区：[1]西南大学物理科学与技术学院,重庆400700

出　　处：《科学技术创新》2022年第25期21-24,共4页Scientific and Technological Innovation

摘　　要：微扰QCD(pQCD)因子化方法已经广泛应用于计算B介子的非轻衰变,随着对微扰QCD框架的不断完善,人们对B介子的研究也从最初的两体衰变问题逐渐转化为对其多体衰变的计算,既往研究表明,利用pQCD因子化方法计算所得的B介子多体衰变分支比与实验结果拟合较好,进一步验证了该方法的有效性。从B介子的研究背景出发,详细介绍pQCD因子化方法,并以 B_(s)^(0)→α_(0)(980)K^(+)K^(-)这一具体衰变道为例,简述用pQCD方法计算其分支比的过程。The perturbation QCD(pQCD)factorization method has been widely used to calculate the non-light decay of B meson.With the continuous improvement of the perturbation QCD framework,the study of B meson has gradually changed from the initial two-body decay problem to the calculation of its multi-body decay.Previous studies have shown that,The multi-body decay branching ratio of B-meson calculated by the pQCD factorization method fits well with the experimental results,which further verifies the effectiveness of the proposed method.Based on the research background of B meson,introduces the method of pQCD factorization in detail,and the process of calculating branch ratio by pQCD method is briefly described by taking this specific decay channel B_(s)^(0)→α_(0)(980)K^(+)K^(-)as an example.

关 键 词：pQCD因子化方法 B介子 衰变 分支比 

分 类 号：O572.33[理学—粒子物理与原子核物理]