Strong coupling from inclusive semileptonic decay of charmed mesons  

作　　者：Jinfei Wu Xinchou Lou Yuzhi Che Gang Li Yanping Huang Manqi Ruan Jingbo Ye 吴金飞;娄辛丑;车逾之;李刚;黄燕萍;阮曼奇;叶竞波(Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;China Center of Advanced Science and Technology,Beijing 100190,China;University of Texas at Dallas,Richardson 75083,Texas,USA;Center for High Energy Physics,Henan Academy of Sciences,Zhengzhou 450046,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [2]China Center of Advanced Science and Technology,Beijing 100190,China [3]University of Texas at Dallas,Richardson 75083,Texas,USA [4]Center for High Energy Physics,Henan Academy of Sciences,Zhengzhou 450046,China [5]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Chinese Physics C》2025年第2期1-6,共6页中国物理C(英文版)

基　　金：Supported by the National Natural Science Foundation of China(12247119,12042507)。

摘　　要：In this study,we employed the heavy quark expansion model with the kinetic scheme to evaluate os(m^(2)_(c)),the strong coupling constant at the chamn quark mass me,using data on inclusive semileptonic decays of charmed mesons.Using the experimental values of the semileptonic decay widths of the D^(0)and the D^(+),the value of ars(m^(2))was determined to be 0.445±0.009±0.114,where the first uncertainty is experimental and the second is systematic.This value of a,(m^(2))is in good agreement with the value of ar,(m^(2)_(c))which calculated by running as(m^(2))athe 20 bo-son mass mz with the renormalization group evolution equation.In addition,the values of a_(s)(m^(2)_(c))obtained individu-ally from each of the D,D+,and D5 mesons were consistent,as they were of the same origin.

关 键 词：strong coupling constant charmed mesons inclusive semileptonic decay heavy quark expansion 

分 类 号：O572.33[理学—粒子物理与原子核物理]