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

被引：4
|
作者：
Zhou, Si-Hong [1 ]
Lu, Cai-Dian [2 ,3 ]
机构：
[1] Inner Mongolia Univ, Sch Phys Sci & Technol, Hohhot 010021, Peoples R China
[2] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
[3] Univ Chinese Acad Sci, Sch Phys, Beijing 100049, Peoples R China
来源：
CHINESE PHYSICS C | 2020年 / 44卷 / 06期
基金：
美国国家科学基金会;
关键词：
CKM phase gamma; charmless two-body B meson decays; global fit; TRANSITION FORM-FACTORS; UB-VERTICAL-BAR; QCD FACTORIZATION; PI;
D O I：
10.1088/1674-1137/44/6/063101
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
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 gamma 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 fit. To 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 gamma is (69.8 +/- 2.1 +/- 0.9)degrees. It is consistent with the current world average values but has a smaller uncertainty.
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页数：8
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