Study of the η'→Ve~+e~- decay with hidden local symmetry model

Within the hidden local symmetry framework, the Dalitz decay η→Ve+e-is studied with the vector meson dominance model. It is found that the partial width Γ(η→ωe+e-)≈40 e V and branching ratio B(η→ωe+e-)≈2×10-4, and Γ(η→ρe+e-)≈10Γ(η→ωe+e-) and B(η→ρe+e-)≈10B(η→ωe+e-). The maximum position of the dilepton distribution is m e+e-≈1.33 Me V. These decays are measurable with the advent of high statistic ηexperiments.

Study of the η'→Ve+e- decay with hidden local symmetry model

Within the hidden local symmetry framework, the Dalitz decay η'→Ve⁺e^- is studied with the vector meson dominance model. It is found that the partial width Γ(η'→ωe⁺e^-)≈40 eV and branching ratio B(η'→ω⁺e^-)≈2×10^-4, and Γ(η'→ρe⁺e^-)≈10Γ(η'→ωe⁺e^-) and B(η'→ρe⁺e^-)≈10B(η'→ωe⁺e^-). The maximum position of the dilepton distribution is m_e⁺e^-≈1:33 MeV. These decays are measurable with the advent of high statistic η' experiments.