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arxiv: 1106.2215 · v1 · pith:CD2IWMZ7new · submitted 2011-06-11 · ✦ hep-ph

Processes e^+e^-toπ⁰({π⁰}')γ in the NJL model

classification ✦ hep-ph
keywords gammamodelprocessesmesonsomegareceivedaccountagreement
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The processes of electron-positron annihilation into $\pi^0\gamma$ and into $\pi'(1300)\gamma$ are considered within the NJL model. Intermediate vector mesons $\rho^0$, $\omega$, $\rho'(1450)$, and $\omega'(1420)$ are taken into account. The latter two mesons are treated as the first radial excited states. They are incorporated into the NJL model by means of a polynomial form factor. Numerical predictions for the cross sections of these processes are received for the center-of-mass energies below 2 GeV. Our results for the $\pi^0\gamma$ production are in agreement with experimental data received in the energy region 600 -- 1020 MeV.

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