Production of ${\pi }^0{\rho }^0$ pair in electron-positron annihilation in the Nambu-Jona-Lasinio model

Abstract

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 $\omega (782),\varphi (1020)$, and ${\omega }^{\prime }(1420)$, where ${\omega }^{\prime }$ is the first radial excitation of $\omega$ - meson was taken into account. Results obtained are in satisfactory agreement with experimental data.

Comments: 5 pages, 1 figure, 1 table