One-Ton-Year Search for Neutrinoless Double Beta Decay with Cuore

Neutrino-less double-beta decay is the only practical way to determine if neutrinos are Majorana particles (their own antiparticles). There are a number of second generation experiments running and reaching fruition. CUORE, the Cryogenic Underground Observatory for Rare Events, is a 750 kg array of TeO2 bolometers operating at ~11 milli-K since 2017 in the LNGS in Assergi Italy. It has recently produced 1-ton year of TeO2 data. It is the prototype for a next generation experiment CUPID (CUORE with Particle Identification). The detector technique and results will be discussed. CUPID is in competition with two major experiments, LEGEND (Large Enriched Ge Neutrino less Double Beta Decay) and nEXO, a large Xe time projection chamber using 136Xe. The DOE and NSF will decide which 1 or 2 of these will receive major next generation funding to go ahead. The decision will be made this summer or fall.