B→K^＊у/Decay in Top-Quark Two-Higgs-Doublet Model

作     者：XIAO Zhen-Jun CHENG Hui-Hui Lü Lin-Xia 

作者机构：Department of Physics and Institute of Theoretical Physics Nanjing Normal University Nanjing 210097 China 

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

年 卷 期：2006年第46卷第5X期

页      面：895-900页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 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 and the Specialized Research Fund for Doctoral Program of Higher Education (SRFDP) under Grant No. 20050319008.We are very grateful to GU0 Li-Bo for helpful discussions 

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

摘      要：By employing the QCD factorization approach for the exclusive B→Vу decays, we study the exclusive decay B→K^＊у in the top-quark two-Higgs-doublet mode/（T2HDM）. Within the considered parameter space, we find the following conclusions （a） A hght charged-Higgs boson with a mass about 200 GeV is clearly excluded by the date of B→K^＊у decay, and this lower limit is comparable with that from the inclusive B→X8＊у decay; （b） The theoretical predictions for CP asymmetry of B→K^＊у in the T2HDM is always less than 1% in size; and （c） The isospin symmetry breaking for B→K^＊у decay in the SM and T2HDM considered here is around 6% in size and well consistent with the data and the general expectations.