Semileptonic and nonleptonic decays of B_(u,d,s)^(*) in the covariant light-front approach  

作　　者：Si-Yang Wang You-Ya Yang Zhi-Jie Sun Hao Yang Peng Li Zhi-Qing Zhang 王思洋;杨幽雅;孙志杰;杨浩;李鹏;张志清(Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics(MOE),Central China Normal University,Wuhan 430079,China;Institute of Theoretical Physics,School of Sciences,Henan University of Technology,Zhengzhou 450001,China;Institute for Complexity Science,Henan University of Technology,Zhengzhou 450001,China)

机构地区：[1]Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics(MOE),Central China Normal University,Wuhan 430079,China [2]Institute of Theoretical Physics,School of Sciences,Henan University of Technology,Zhengzhou 450001,China [3]Institute for Complexity Science,Henan University of Technology,Zhengzhou 450001,China

出　　处：《Chinese Physics C》2024年第12期20-36,共17页中国物理C（英文版）

基　　金：partly supported by the National Natural Science Foundation of China(11347030);the Program for Science and Technology Innovation Talents in Universities of Henan Province(14HASTIT037);the Natural Science Foundation of Henan Province,China(232300420116)。

摘　　要：The semileptonic and nonleptonic decays of the b-flavor vector mesons B_(u,d,s)^(*) and B_(c)^(*) are investigated within the covariant light-front quark model(CLFQM).By calculating the form factors of the transitions B_(u,d,s)^(*)→P under the CLFQM,with P denoting a pseudoscalar meson,i.e.,π,K,η_(c)(1S,2S),D_((s)),B_((s)),we predict and discuss several physical observables,including the branching ratios,polarization fractions f_(L),f_(∥),and forward-backward asymmetries A_(FB).The total widths of the single-photon radiative decay channels for these b-flavor vector mesons are estimated using their partial widths.In these considered decays,one can find that the semileptonic decays B_(s)_(*0)→D_(s)^(-)l′+ν_(l′)and B_(c)^(*+)→B_(s)^(0)l′+ν_(l′),η_(c)l′+ν_(l′),with l′being e orτ,and the nonleptonic channels B*+c→B0sπ+,B0sρ+have the largest branching ratios,which can reach up to the 10^(-7) order,and are most likely to be accessible at the future high-luminosity LHCb and Belle-II experiments.

关 键 词：b-flavor vector mesons B^(*) covariant light-front quark model branchig ratio 

分 类 号：O572.33[理学—粒子物理与原子核物理]