中文摘要：

With the recent investigations of the gg-η (’) transition form factor and η-η’ mixing scheme,we present an updated study of the radiative decays J/ψ→η (’) γ in perturbative QCD.The decays are taken as a test ground for the gg-η (’) transition form factors and the η-η’ mixing scheme.The form factors are found to be working for glunic η’ production and the mixing angle is constrained to be φ=35.1°±0.8°.

英文摘要：

With the recent investigations of the g＊g＊-η（＇） transition form factor and mixing scheme, we present an updated study of the radiative decays J/ψ→η（＇）γ in perturbative QCD. The decays are taken as a test ground for the g＊g＊-η（＇） transition form factors and the η-η＇ mixing scheme. The form factors are found to be working for glunic η＇ production and the mixing angle is constrained to be φ = 35.1°±1 0.8°.