Pseudoscalar mixing in J/ψ and ψ(2S) decay  

作　　者：魏代会 杨永栩 

机构地区：[1]College of Physics and Technology, Guangxi Normal University

出　　处：《Chinese Physics C》2010年第12期1785-1790,共6页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10979012)

摘　　要：Based on the branching fractions of J/ψ（ψ（2S））→ VP from different collaborations, pseudoscalar mixing is extensively discussed with a well established phenomenological model. The mixing angle is determined to be -14° by fitting to the new world average if only quark content is considered. After taking into account the gluonic content in η and η＇ simultaneously, the investigation shows that η favors only consisting of light quarks, while the gluonic content of η＇ is Z2η＇, = 0.30±0.24.Based on the branching fractions of J/ψ（ψ（2S））→ VP from different collaborations, pseudoscalar mixing is extensively discussed with a well established phenomenological model. The mixing angle is determined to be -14° by fitting to the new world average if only quark content is considered. After taking into account the gluonic content in η and η＇ simultaneously, the investigation shows that η favors only consisting of light quarks, while the gluonic content of η＇ is Z2η＇, = 0.30±0.24.

关 键 词：pseudoscalar mixing J/ψ decay branching fraction 

分 类 号：O571.3[理学—粒子物理与原子核物理] P315.7[理学—物理]