B_(c) meson and its scalar cousin with QCD sum rules  

作　　者：Zhi-Gang Wang 王志刚(Department of Physics,North China Electric Power University,Baoding 071003,China)

机构地区：[1]Department of Physics,North China Electric Power University,Baoding 071003,China

出　　处：《Chinese Physics C》2024年第10期48-58,共11页中国物理C（英文版）

基　　金：Supported by the National Natural Science Foundation,China(12175068)。

摘　　要：In this study,we use the optical theorem to calculate the next-to-leading order corrections to the QCD spectral densities directly in the QCD sum rules for the pseudoscalar and scalar B_(c) mesons.We use experimental data for guidance to perform an updated analysis.We obtain the masses and,in particular,decay constants,which are the fundamental input parameters in high energy physics.Ultimately,we obtain the pure leptonic decay widths,which can be compared with experimental data in the future.

关 键 词：next-to-leading order contributions QCD sum rules 

分 类 号：O572.33[理学—粒子物理与原子核物理]