Results of the CUPID-Mo Experiment

CUPID-Mo was a successful demonstrator experiment for CUPID (CUORE Upgrade with Particle ID), the planned next-generation upgrade of the first ton scale cryogenic calorimetric 0νββ decay experiment, CUORE (Cryogenic Underground Observatory for Rare Events). CUPID-Mo operated at Laboratoire Souterrain de Modane in France as an array of 20 enriched Li₂¹⁰⁰MoO₄ (LMO) cylindrical scintillating crystals (~210g each) each facing a Ge light detector (LD) and operated at ~20 mK. Both were instrumented with NTD thermistors allowing for the collection of both heat and scintillation light which makes $\alpha$ events easily distinguishable from β/γ events. This significantly reduces the background resulting from degraded α energy collection in the heat channel. CUPID-Mo demonstrated an energy resolution of ~7 keV (FWHM) at 2615 keV, complete α / (β/γ) discrimination and very low radioactive contamination. Here we report the results of an analysis of the full CUPID-Mo exposure, with details on improved analysis techniques and present an updated limit on the 0νββ decay half-life for ¹⁰⁰Mo. We also discuss analysis of a ⁵⁶Co calibration to probe the energy bias and resolution scaling, especially near the Q-value (3034 keV) of the decay. A brief overview of other ongoing analyses will also be presented.