Study of the neutrino-oxygen cross sections of the charged-current reaction 16O(${\bar{\nu }}_e,e^{+}$)16N(0 MeV,$2^{-}$) and the neutral-current reaction 16O($\nu ,\nu$')16O(12.97/12.53 MeV,$2^{-}$), producing high-energy gamma rays

Abstract

In the previous work, we discussed the cross section and the detection of 4.4-MeV $\gamma$ rays produced in the neutrino neutral-current (NC) reaction ${}^{16}$O($\nu ,{\nu }^{\prime }$)${}^{16}$O(12.97 MeV and 12.53 MeV, $2^{-}$) in a water Cherenkov detector at the low energy below 100 MeV. In this report, we further investigated both the charged-current (CC) reaction ${}^{16}$O(${\bar{\nu }}_e,e^{+}$)${}^{16}$N(0 MeV, $2^{-}$) and the NC reaction${}^{16}$O($\nu ,{\nu }^{\prime }$)${}^{16}$O(12.97 MeV and 12.53 MeV, $2^{-}$), producing high-energy $\gamma$ rays, in which the more solid identification of the reactions can be applied via the coincidence method.

Comments: 16 pages, 5 figures, 6 tables