Semileptonic Decays of ρ, ω, ϕ, η and η′ Mesons in Ground and First Radially Excited States in the U(3)×U(3) NJL Model.

In the extended U (3) × U (3) NJL quark model, semileptonic decays of ρ , ω , ϕ , η and η ′ mesons in both the ground and first radially excited states are described. Quark loops of the anomalous type are considered, which are based on the vertex η → V V . The obtained results are in satisfactory agreement with the existing experimental data. In addition, a number of predictions for experimentally unmeasured decays of radially excited mesons are presented. [ABSTRACT FROM AUTHOR]