Detect Supernova Neutrinos with DarkSide-20k Liquid Argon Time Projection Chamber

Core collapse supernovae are among the most violent and luminous events in the universe. Their energy is derived from the gravitational collapse of the stellar core, and is emitted away through neutrinos, gravitational waves, explosions and photons. Although physicists and astrophysicists devote great efforts to the study of core collapse supernova, its mechanism remains mysterious, making the next detection of core collapse supernova – particularly through neutrinos – of great scientific interest and importance. We report here that the DarkSide-20k liquid argon time projection chamber ( LAr TPC ) can play an important and unique role in such observations. The ~ 39 tonne active LAr mass TPC of DarkSide-20k can detect about 220 neutrino events from a typical core collapse supernova at a distance of 10 kpc, via the channel of coherent elastic neutrino nucleus scattering ( CEvNS ) that is equally sensitive to all types of active neutrinos. These neutrino events would enable us to extract invaluable information of the supernova and to study fundamental properties of neutrinos, which includes measuring the luminosity and spectrum of neutrinos, observing the neutronization burst, and probing the absolute mass and mass hierarchy of neutrinos.