2025/04/19 by Alfonso, K., Armatol, A., Augier, C. +189
#FOS: Physical sciences #Nuclear Experiment (nucl-ex)
paper · doi:10.48550/arxiv.2504.14369
CUPID is a next-generation bolometric experiment to search for neutrinoless double-beta decay (0νββ) of 100Mo using Li2MoO4 scintillating crystals. It will operate 1596 crystals at ∼10 mK in the CUORE cryostat at the Laboratori Nazionali del Gran Sasso in Italy. Each crystal will be facing two Ge-based bolometric light detectors for α rejection. We compute the discovery and the exclusion sensitivity of CUPID to 0νββ in a Frequentist and a Bayesian framework. This computation is done numerically based on pseudo-experiments. For the CUPID baseline scenario, with a background and an energy resolution of 1.0 × 10-4 counts/keV/kg/yr and 5 keV FWHM at the Q-value, respectively, this results in a Bayesian exclusion sensitivity (90% c.i.) of T1/2 > 1.6+0.6-0.5 × 1027 yr, corresponding to the effective Majorana neutrino mass of mββ < 9.6 -- 16.3 meV. The Frequentist discovery sensitivity (3σ) is T1/2= 1.0 × 1027 yr, corresponding to mββ= 12.2 -- 20.6 meV.