B→A transitions in the light-cone QCD sum rules with the chiral current  

作　　者：孙艳军 王志刚 黄涛 

机构地区：[1]Institute of High Energy Physics and Theoretical Physics Center for Science Facilities,Chinese Academy of Sciences [2]Departments of Physics and Electronic Engineering,Northwest Normal University [3]Department of Physics,North China Electric Power University

出　　处：《Chinese Physics C》2012年第11期1046-1054,共9页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(10735080,10805082,10675098,11075053);the Fundamental Research Funds for the Central Universities

摘　　要：In this article, we calculate the form-factors of the transitions B → a1（1260）, b1（1235） in the leading-order approximation using the light-cone QCD sum rules. In calculations, we choose the chiral current to interpolate the B-meson, which has the outstanding advantage that the twist-3 light-cone distribution amplitudes of the axial-vector mesons makes no contributions, and the resulting sum rules for the form-factors suffer from far fewer uncertainties. Then we study the semi-leptonic decays B → a1（1260） lvl, b1（1235） lvl （l=e,μ,τ）, and make predictions for the differential decay widths and decay widths, which can be compared with the experimental data in the coming futureIn this article, we calculate the form-factors of the transitions B → a1（1260）, b1（1235） in the leading-order approximation using the light-cone QCD sum rules. In calculations, we choose the chiral current to interpolate the B-meson, which has the outstanding advantage that the twist-3 light-cone distribution amplitudes of the axial-vector mesons makes no contributions, and the resulting sum rules for the form-factors suffer from far fewer uncertainties. Then we study the semi-leptonic decays B → a1（1260） lvl, b1（1235） lvl （l=e,μ,τ）, and make predictions for the differential decay widths and decay widths, which can be compared with the experimental data in the coming future

关 键 词：B-meson decay axial-vector mesons light-cone QCD sum rules chiral current 

分 类 号：O572.243[理学—粒子物理与原子核物理]