γ\n production in neutrino interactions with nuclei

Abstract

We evaluate the cross section for gamma production by neutrinos through a meson exchange effect which derives from the concept of axial-vector mixing. The resulting cross section leads to some increase of the gamma production cross section by neutrinos, especially at low neutrino energies, which may influence the understanding of the low-energy excess of electron-like events seen in the MiniBooNE experiment.