Production of $\pi^0\rho^0$ pair in electron-positron annihilation in   the Nambu-Jona-Lasinio model
  The process $e^+e^- \to \pi^0\rho$ is described in the framework of the expanded NJL model in the energy region from 0.9 GeV to 1.5 GeV. The contribution of intermediate state with vector mesons $\omega(782), \,\,\phi(1020)$, and $\omega'(1420)$, where $\omega'$ is the first radial excitation of $\omega$ - meson was taken into account. Results obtained are in satisfactory agreement with experimental data. 
A. I. Ahmadov, E. A. Kuraev, M. K. Volkov
hep-ph