The processes $e^{+}e^{-} \to ππ(π')$ in the extended NJL model

The process $e^{+}e^{-} \to π^{+}π^{-}$ is described in the framework of the extended NJL model. Intermediate vector mesons $ρ^0(770)$, $ω(782)$ and ρ'(1450)$are taken into account. Our results are in satisfactory agreement with experimental data. The prediction for the process$e^{+}e^{-} \to ππ'(1300)$is given. Here the main contribution is given by the diagram with intermediate$ρ'(1450)$ meson.

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