Discussion on \(\bar{\nu }_{e}\) Search

Through this analysis, we searched for \(\bar{\nu }_{e}\) signals in the low-energy region, a new energy region for SK in terms of the \(\bar{\nu }_{e}\) dedicated analysis. Before starting this analysis, the reactor antineutrinos, which should dominate other \(\bar{\nu }_{e}\) sources, had not been observed with SK. We discuss the reactor neutrino and the sensitivities for other astrophysical sources.