B介子稀有衰变与K-M矩阵

A Rare Decay of B-meson and the Kobayashi-Maskawa Matrix

本文在已给出的K—M矩阵U(λ_1,λ_2)基础上,研究了衰变过程B→Kl+l^-+X.三代情形,分支比主要依赖 m+且不确定性很小.四代情形时,比值可有较大增长,我们讨论了分支比与相位φ_(ij)以及质量m_(tt)之间的关系,特别是λ_2对分支比的影响十分显著.

Based on the K—M matrix U(λ_1,λ_2),the decay process B→Kl^+l^-+X is investigated,With three generations,the branching ratio mainly dependson m_t and has very little uncertainty,With four generations,the rate,getsa large increase.The dependence of the branching ratio on the phases φijand mass m_t′are discussed,The effect of λ_2 on the rate is quite important