B→K~*γ Decay in Top-Quark Two-Higgs-Doublet Model

作     者：XIAO Zhen-Jun,~+ CHENG Hui-Hui, and L Lin-Xia Department of Physics and Institute of Theoretical Physics, Nanjing Normal University, Nanjing 210097, China 

作者机构：Department of Physics Nanjing Normal University Institute of Theoretical Physics Nanjing Normal University 

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

年 卷 期：2006年第46卷第11期

页      面：895-900页

核心收录：

学科分类：07[理学] 0704[理学-天文学] 070202[理学-粒子物理与原子核物理] 0702[理学-物理学] 

基　　金：The project partially supported by National Natural Science Foundation of China under Grant Nos. 10275035 and 10575052 the Specialized Research Fund for Doctoral Program of Higher Education (SRFDP) under Grant No. 20050319008 

主　　题：B meson decay charged-Higgs boson branching ratio CP asymmetry 

摘      要：By employing the QCD factorization approach for the exclusive B→Vγ decays, we study the exclusive decay B→K~*γ in the top-quark two-Higgs-doublet model (T2HDM). Within the considered parameter space, we find the following conclusions (a) A light charged-Higgs boson with a mass about 200 GeV is clearly excluded by the date of B→K~*γ decay, and this lower limit is comparable with that from the inclusive B→Xγ decay; (b) The theoretical predictions for CP asymmetry of B→K~*γ in the T2HDM is always less than 1% in size; and (c) The isospin symmetry breaking for B→K~*γ decay in the SM and T2HDM considered here is around 6% in size and well consistent with the data and the general expectations.