Search for $\nu_{e} \;$ - $ ^{16}\textrm{O}$ Interactions From Low Energy Atmospheric Neutrinos in Super-Kamiokande

Charged-current scattering of $\nu_{e} \;$ below 100 MeV from $ ^{16}\textrm{O}$ nucleus is not yet measured. This interaction is an important background for diffuse supernova background searches (DSNB) with inverse beta decay process in water Cherenkov detectors, a useful $\nu_{e} \;$ detection channel in case of a supernova burst, and a possible way to probe atmospheric neutrino flux at low energies that will be a background for the future WIMP dark matter searches. 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, and now methods to separate signal from the backgrounds are being studied. In this talk, both the event generator and the current status of the analysis will be discussed.