Status of Atmospheric Flux-Weighted νe - 16O Cross-Section Measurement Below 125 MeV Neutrino Energy In Super-Kamiokande

Charged-current scattering of νe below 125 MeV from 16O nucleus is not yet measured. This interaction is a νe 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 νe - 16O 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 νe - 16O interactions are a way to probe the atmospheric νe flux at low energies to better estimate this background. A study for the first observation of this interaction from atmospheric νe with 20 years of Super-Kamiokande data is currently underway, with the goal of measuring atmospheric νe flux-weighted cross-section below 100 MeV. For this purpose, a custom event generator that can accurately simulate products of νe - 16O 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 νe - 16O and background interactions are obtained. Currently statistical methods to use this information to extract number of νe - 16O 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.