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The procedure for obtaining the radiative decay constants of pseudoscalar and vector unflavored mesons in point–form of Poincaré-invariant quantum mechanics is presented. In the course of the work the authors determine the remaining parameters from  V  →  P γ   and  P  →  V γ   experimental decay value, using the obtained earlier parameters of the model for light ( u, d  and  s ) quarks. As a result, the mixing angles for pseudoscalar and vector meson sector were obtained taking into account gluonium content for  η  –  η ′ meson sector.

Poincaré-covariant quark model of electroweak light mesons decays