QCD因子化在湮没衰变_(s,d)~0→J/ψγ中的应用  

Analysis of the Annihilation Decay _(s,d)~0→J/ψγ with QCD Factorization 

作　　者：鲁公儒[1] 王茹敏[1] 杨亚东[1] 

机构地区：[1]河南师范大学物理与信息工程学院,新乡453007

出　　处：《高能物理与核物理》2005年第3期232-236,共5页High Energy Physics and Nuclear Physics

基　　金：国家自然科学基金 (10 3 0 5 0 0 3 );河南省杰出青年基金 (0 3 12 0 0 170 0 )资助~~

摘　　要：在QCD因子化框架下 ,对可能的辐射湮灭衰变 B0s ,d→J/ψγ进行研究 .在标准模型中 ,相对于简单因子化下领头阶的分支比 ,αs 阶非因子化辐射修正对分支比有显著的量级上的改变 ,这些衰变可用来检验因子化方法 .在理论上 ,B介子稀有辐射衰变对超出标准模型的新物理特别敏感 .作为一个例子 ,我们考虑右手带电流对标准模型中左手流可能的混合效应 ,这个混合对衰变分支比有显著的影响 .We study the radiative annihilation decay 0 s,d →J/ψ γ in the framework of QCD factorization. We show that the nonfactorizable radiative correction at the order α s changes the magnitude sighificantly in comparison with the leading-order result with the naive factorization in the Standard Model. Future measurements of these decays would be useful for testing the factorization framework. Rare radiative decays of B mesons received considerable theoretical attention due to their special sensitivity to physics beyond the Standard Model. As an example, we consider the effects of the admixture of right-hand charge currents to the standard left-hand current. This admixture will give a significant contribution to the decays.

关 键 词：QCD因子化 衰变分支 B介子 混合效应 辐射湮没 

分 类 号：O571[理学—粒子物理与原子核物理]