Description
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 $0\nu\beta\beta$ decay experiment. CUPID-Mo operated at Laboratoire Souterrain de Modane (LSM) in France as an array of 20 enriched Li$_{2}$$^{100}$MoO$_{4}$ (LMO) cylindrical scintillating crystals ($\sim$200g each) each featuring a Ge light detector (LD), operated at $\sim$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 $\alpha$ vs $\beta$/$\gamma$’s, significantly reducing the background from degraded $\alpha$’s. CUPID-Mo has a demonstrated energy resolution of $\sim$7 keV (FWHM) at 2615 keV, complete $\alpha$ / $\beta$/$\gamma$ 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 $0\nu\beta\beta$ decay half-life for $^{100}$Mo.
| Collaboration | CUPID-Mo |
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