Quasi-two-body B_((s))→K^(*)γ→Kπγ decays in the perturbative QCD approach

作     者：Zhi-Qing Zhang Yan-Chao Zhao Zhi-Lin Guan Zhi-Jie Sun Zi-Yu Zhang Ke-Yi He 张志清;赵彦超;关志林;孙志杰;张梓於;何珂依

作者机构：Department of PhysicsHenan University of TechnologyZhengzhou 450052China 

出 版 物：《Chinese Physics C》 (中国物理C（英文版）)

年 卷 期：2022年第46卷第12期

页      面：126-134页

核心收录：

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

基　　金：Supported in part by the National Natural Science Foundation of China under(11347030) the Program of Science and Technology Innovation Talents in Universities of Henan Province(14HASTIT037) 

主　　题：B meson decay perturbative QCD three-body radiative decay 

摘      要：In this study,we investigate quasi-two-body B_((s))→K^(*)γ→Kπγ decays in the perturbative QCD ***-meson distribution amplitudes are introduced to describe the final state interactions of the Kπpair,which involve time-like form factors and Gegenbauer *** calculate the CP averaged branching ratios of the B_((s))→K^(*)γ→Kπγ *** results are in agreement with newly updated data measured by Belle Ⅱ.This suggests that it is more appropriate to analyze these quasi-two-body B decays in the three-body framework than the two-body *** also predict direct CP asymmetries for the considered decay modes and find that A_CP(B_(u,d)→K^(*)γ→Kπγ) is small and less than 1% in magnitude,whereas A_CP(B_(s)→K^(*)γ→Kπγ)is larger and can reach a few *** predictions can be tested in future B meson experiments.