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The coherent elastic neutrino-nucleus scattering (CEvNS) plays a crucial roleat the final evolution of stars. The detection of it would be of importance inastroparticle physics. Among all available neutrino sources, galacticsupernovae give the highest neutrino flux in the MeV range. Among all liquidxenon dark matter experiments, XMASS has the largest sensitive volume and lightyield. The possibility to detect galactic supernova via the CEvNS-process onxenon nuclei in the current XMASS detector was investigated. The total numberof events integrated in about 18 seconds after the explosion of a supernova10~kpc away from the Earth was expected to be from 3.5 to 21.1, depending onthe supernova model used to predict the neutrino flux, while the number ofbackground events in the same time window was measured to be negligible. Alllead to very high possibility to detect CEvNS experimentally for the first timeutilizing the combination of galactic supernovae and the XMASS detector. Incase of a supernova explosion as close as Betelgeuse, the total observableevents can be more than ten thousand, making it possible to distinguishdifferent supernova models by examining the evolution of neutrino event rate inXMASS.

Detectability of galactic supernova neutrinos coherently scattered on xenon nuclei in XMASS