摘要
根据PDG-2004给出的J/ψ→VP各衰变道的分支比的世界平均值,利用对能量有依赖的η-η′混合角方案,对赝标量介子混合重新作了分析,由此得到η和η′的混合角θη=(-9.0±4.9)°,ηθ′=(-20.8±3.0)°.对J/ψ衰变中DOZI的贡献和SU(3)破坏也作了讨论和分析.
Based on the branching fractions of J/ψ→VP VP quoted in PD-2004, we make a new analysis to the mixing of pseudoscalars using an energy-dependent η-η′ mixing angle scheme. The mixing angle is determined to be θη=(-9.0±4.9)°and θη′=(-20.8±3.0)°,respectively. We also present a discussion for DOZI contribution and SU(3) breaking.
出处
《河南师范大学学报(自然科学版)》
CAS
CSCD
北大核心
2006年第4期50-54,共5页
Journal of Henan Normal University(Natural Science Edition)
基金
国家自然科学基金资助项目(10575029)
关键词
衰变振幅
混合角
(3)破坏
mixing angle
pseudoscalar mixing
SU (3) breaking