First Result on the Neutrinoless Double Beta Decay of 82Se with CUPID-0

CUPID-0 is the first large mass experiment based on cryogenic calorimeters (bolometers) which implements the dual read-out of light and heat for background rejection. The detector, consisting of 24 enriched Zn 82 ^{82} Se crystals (5.28 kg of 82 ^{82} Se), is taking data in the underground LNGS (Italy) from March 2017. In this poster we will present the analysis that allowed to set the most stringent limit on the half-life of neutrino-less double beta decay of 82 ^{82} Se. We will show how the particle identification, enabled by the simultaneous read-out of heat and light, provides an unprecedented background level for cryogenic calorimeters of 3.6×10^{−3} counts/keV/kg/y.