Problem of radial excitations of light mesons and interpretation of the iota-meson

Radial (L=0) excitations of light (including strange) mesons are considered in the framework of the quark phenomenological model. The predicted spectrum of excitations is compared with experimentally observed resonances. The dependence of energy levels on quark masses is pointed out that explains the nearness of rho (1600) and phi(1680) resonances. The possibility of interpreting the iota (1440)-resonance as a radial excitation of eta (549) and eta' (958) mesons is analyzed. It is indicated that available experimental data are not sufficient for unambiguous identification of the spectrum of radial excitations of light mesons. Also the problem of definition of quark charges from processes eta(etaA) → 2γ is re-examined