Mixing parameters of η and η′ mesons

Mixing angles of η and η′ mesons are obtained in the scheme of octet-singlet mixing θ η = −15.4°, θ′ η = −17.9°, and in the scheme connected with expansion in the quark basis q − s φ = 39.3°. The constants gV ηγ , g η′ V γ of radiative decays η′ → V γ and V → ηγ ( V ≡ ρ, ω, φ) and the ratios of constants of weak decays of η and η′ mesons are calculated. The numerical values that were found are in agreement with the experimental data.