Final Results on the 0νββ decay half-life limit in 100Mo using the full exposure of CUPID-Mo

CUPID-Mo has served as a successful demonstrator experiment for CUPID (CUORE Upgrade with Particle ID), the planned next-generation upgrade of CUORE (Cryogenic Underground Observatory for Rare Events), a ton scale cryogenic calorimetric 0νββ decay experiment. CUPID-Mo operated at Laboratoire Souterrain de Modane (LSM) in France as an array of 20 enriched Li2100MoO4 (LMO) cylindrical scintillating crystals (∼200g each) each featuring a Ge light detector (LD), operated at ∼20 mK. The LMOs and LDs are instrumented with NTD thermistors allowing for the collection of both heat and scintillation light. This dual mode of energy collection allows for event-by-event discrimination of α vs β/γ’s, significantly reducing the background from degraded α’s. CUPID-Mo has a demonstrated energy resolution of ∼7 keV (FWHM) at 2615 keV, complete α / β/γ discrimination and very low radioactive contamination. Here we present the results of the analysis of the full CUPID-Mo exposure, showcasing improved analysis techniques, and give an updated limit on the 0νββ decay half-life for 100Mo.