Speaker
Description
Charged-current scattering of $\nu_{e} \;$ below 100 MeV from ${}^{16}\textrm{O}$ nucleus is not yet measured. This interaction is a $\nu_{e} \;$ detection channel for water Cherenkov detectors in case of a supernova burst. Furthermore, in Super-Kamiokande diffuse supernova neutrino background (DSNB) is being searched with the inverse beta decay process and $\nu_{e} \;$ - ${}^{16}\textrm{O}$ interactions from atmospheric neutrinos are a background to this search. Finally, atmospheric neutrinos at this energy range will be a background for the future WIMP dark matter searches via coherent elastic neutrino-nucleus scattering and $\nu_{e} \;$ - ${}^{16}\textrm{O}$ interactions are a way to probe the atmospheric $\nu_{e} \;$ flux at low energies to better estimate this background. A study for the first observation of this interaction from atmospheric $\nu_{e} \;$ with 20 years of Super-Kamiokande data is currently underway, with the goal of measuring atmospheric $\nu_{e} \;$ flux weighted cross section below 100 MeV. For this purpose, a custom event generator that can accurately simulate products of $\nu_{e} \;$ - ${}^{16}\textrm{O}$ and $\bar{\nu}_{e} \;$ - ${}^{16}\textrm{O}$ interactions has been built. Based on the output of this event generator and detector simulations, visible energy distributions and probability of gamma and neutron emissions in Super-Kamiokande for $\nu_{e} \;$ - ${}^{16}\textrm{O}$ and background interactions are obtained. Currently statistical methods to use this information to extract number of $\nu_{e} \;$ - ${}^{16}\textrm{O}$ events in the Super-Kamiokande data are being studied. In this poster, both the event generator and the current status of the analysis will be discussed.
| Collaboration | Super-Kamiokande Collaboration |
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