D^*Dρ and B^*Bρ strong couplings in light-cone sum rules

作     者：Chao Wang Hua-Dong Li 王超;李华东

作者机构：School of physicsNankai University.Weijin Road 94Tianjin 300071China Institute of High Energy PhysicsCASP.O.Box 918Beijing 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7期

页      面：34-42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 in part by National Natural Science Foundation of China(11521505) 

主　　题：strong couplings light-cone sum rules double dispersion relation 

摘      要：We present an improved calculation of the strong coupling constants gD*Dp and gB*Bp in light-cone sum rules,including one-loop QCD corrections of leading power with meson distribution *** further compute subleading-power corrections from two-particle and three-particle higher-twist contributions at leading order up to twist-4 *** next-to-leading order corrections to the leading power contribution numerically offset the subleading-power corrections to a certain extent,and our numerical results are consistent with those of previous studies on sum rules.A comparison between our results and existing model-dependent estimations is also made.