Extraction of the CKM phase γ from the charmless two-body B meson decays

作     者：Si-Hong Zhou Cai-Dian Lü 周四红;吕才典

作者机构：School of Physical Science and TechnologyInner Mongolia UniversityHohhot 010021China Institute of High Energy PhysicsCASBeijing 100049China School of PhysicsUniversity of Chinese Academy of SciencesBeijing 100049China 

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

年 卷 期：2020年第44卷第6期

页      面：12-19页

核心收录：

学科分类：0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 0804[工学-仪器科学与技术] 0827[工学-核科学与技术] 0703[理学-化学] 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：Supported by National Science Foundation of China(11847040,11947414,11521505,11621131001) Scientific Research Foundation of Inner Mongolia University 

主　　题：CKM phase charmless two-body B meson decays global fit 

摘      要：Using all experimentally measured charmless B → PP, PV decay modes, where P(V) denotes a light pseudoscalar(vector) meson, we extract the CKM angle γ by a global fit. All hadronic parameters are determined from the experimental data, such that the approach is least model dependent. The contributions of the various decay modes are classified by the topological weak Feynman diagram amplitudes, which are determined by the global *** improve the precision of the approach, we consider the flavor SU(3) breaking effects of the topological diagram amplitudes of the decay modes by including the form factors and decay constants. The fit result for the CKM angle γ is( 69.8 ± 2.1 ± 0.9)°. It is consistent with the current world average values but has a smaller uncertainty.