Search for Low-energy Electron Antineutrinos in KamLAND Associated with Gravitational Wave Events

Abstract

We present the results of a search for MeV-scale electron antineutrino events in KamLAND in coincident with the 60 gravitational wave events/candidates reported by the LIGO/Virgo collaboration during their second and third observing runs. We find no significant coincident signals within a $\pm$ 500 s timing window from each gravitational wave and present 90% C.L. upper limits on the electron antineutrino fluence between $10^8$-$10^{13}\mathrm{c}{m}^2$ for neutrino energies in the energy range of 1.8-111 MeV.

11 pages, 2 figures, 2 tables, Accepted for publication in ApJ