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

作　　者：Chao Wang Hua-Dong Li 王超;李华东(School of physics,Nankai University.Weijin Road 94,Tianjin 300071,China;Institute of High Energy Physics,CAS,P.O.Box 918,Beijing 100049,China;School of Physics,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]School of physics,Nankai University.Weijin Road 94,Tianjin 300071,China [2]Institute of High Energy Physics,CAS,P.O.Box 918,Beijing 100049,China [3]School of Physics,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Physics C》2020年第7期34-42,共9页中国物理C（英文版）

基　　金：Supported in part by National Natural Science Foundation of China(11521505)。

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 amplitudes.We further compute subleading-power corrections from two-particle and three-particle higher-twist contributions at leading order up to twist-4 accuracy.The 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.

关 键 词：strong couplings light-cone sum rules double dispersion relation 

分 类 号：O572.33[理学—粒子物理与原子核物理]