Decays of excited strange mesons in the extended NJL model

A chiral U(3) x U(3) Lagrangian, containing besides the usual meson fields their first radial excitations, is considered. The Lagrangian is derived by bosonization of the Nambu-Jona-Lasinio (NJL) quark model with separable nonlocal interactions. The spontaneous breaking of chiral symmetry is governed by the NJL gap equation. The first radial excitations of the kaon, K* and φ are described with the help of two form factors. The values for the decay widths of the processes K*' → ρK, K*' → K*π, K*' → Kπ, φ' → K bar K, K' → Kρ, K' → K*π and K' → K2π are obtained in qualitative agreement with the experimental data