【摘要】 基于量子色动力学（ＱＣＤ）的轴矢反常，讨论确定η′（以及η）与ηｃ混合的新方法。通过η′－ηｃ和η－ηｃ混合机制可以得到与实验符合的Ｊ／ψ→γη′和Ｊ／ψ→γη衰变宽度。由η′（以及η）与激发态ηｃ′的混合，预言分支比ＢＲ（ψ′→γη′）＝（１．８±０．９）×１０－４，ＢＲ（ψ′→γη）＝（３．４±１．５）×１０－５。特别是，通过η′与色八重态粲夸克对（ｃｃ）８的混合和ｂ→（ｃｃ）８ｓ衰变，有可能解释最近ＣＬＥＯ观察到的Ｂ→η′Ｘ衰变过程的大分支比。更多还原

【Abstract】 A new approach for the η′ (and η) η c mixing is discussed on the basis of the axial anomaly in QCD.Through η′(η) η c mixing the calculated J/ψ→γη′ and J/ψ→γη decay widths agree with experimental data.By the mixing of η′(η) with excited state η′ c, branching ratios BR(ψ′→γη′ )=(1.8±0.9)×10 -4 and BR(ψ′→γη )=(3 4±1 5)×10 -5 are predicted.In particular,by the mixing between η′ and color octet (c ) 8 pair and b→(c) 8s decay,the large branching ratio for B→η′X decay observed by CLEO recently may be explained.更多还原