Impact of a_(0)^(0)(980)-f_(0)(980) mixing on the localized CP violations of the B^(-)→K^(-)π^(+)(π)^(-) decay

作     者：Jing-Juan Qi Xuan Zhang Chao Wang Zhen-Yang Wang Xin-Heng Guo 祁敬娟;张萱;王超;王振洋;郭新恒

作者机构：Zhejiang Wanli UniversityZhejiang 315101China Center for Ecological and Environmental SciencesKey Laboratory for Space Bioscience and BiotechnologyNorthwestern Polytechnical UniversityXi’an 710072China Physics DepartmentNingbo UniversityZhejiang 315211China College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China 

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

年 卷 期：2022年第46卷第8期

页      面：141-148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 by National Natural Science Foundation of China (12105149,11775024 and 11947001) Natural Science Foundation of Zhejiang Province(LQ21A050005) Ningbo Natural Science Foundation (2021J180) the Fundamental Research Funds for the Provincial Universities of Zhejiang Province 

主　　题：CP violation heavy quark physics B meson decay 

摘      要：In the framework of the QCD factorization approach,we study the localized CP violations of the B^(-)→K^(-)π^(+)(π)^(-)decay with and without the a_(0)^(0)(980)-f_(0)(980) mixing mechanism and observe that the localized CP violation can be enhanced by this mixing effect when the mass of the π^(+)(π)^(-)pair is in the vicinity of the f_(0)(980) *** corresponding theoretical prediction results are A_(CP)(B^(-)→Kf_(0)→K^(-)π^(+)(π)^(-))=[0.126,0.338](0.232±0.106 with the central value form) and A_(CP)(B^(-)→K^(-)f_(0)(a_0)→K^(-)π^(+)(π)^(-))=[0.230,0.615](0.423±0.193 with the central value form),***,we also calculate the branching fraction of the B^(-)→K^(-)f_(0)(980)→K^(-)π^(+)(π)^(-)decay,which is consistent with the experimental *** suggest that the a_(0)^(0)(980)-f_(0)(980) mixing mechanism should be considered when theoretically and experimentally studying the CP violation of the B or D meson decays.