The radiative transition form factors of the pseudoscalar mesons {π,
η, η′} and the vector mesons {ρ, ω, ϕ} are restudied
with π-η-η′ and ρ-ω-ϕ in tri-meson-mixing
pattern, which is described by tri-mixing matrices in the light-cone
constituent quark model. The experimental transition decay widths are better
reproduced with tri-meson-mixing than previous results in a two-mixing-angle
scenario of only two-meson η-η′ mixing and ω-ϕ mixing.Comment: 8 pages, 6 figures, final version to appear in EPJ