Quest for Low-Energy Neutrinos with Theia

Theia is a proposed large-scale neutrino detector designed to discriminate between Cherenkov and scintillation signals in order to enable a broad physics program. The baseline design consists of a tank filled with a water-based liquid scintillator (WbLS), a novel target merging the Cherenkov signal's particle direction reconstruction with the scintillator detector's remarkable energy resolution and low detection threshold. This talk will focus on the sensitivity of Theia towards the detection of low-energy neutrinos, such as solar, geo-, reactor, supernova burst, and diffuse supernova background neutrinos. Moreover, Theia can be adapted to search for neutrinoless double-beta decay, with a sensitivity reaching the normal ordering regime of neutrino mass phase space.