Speaker
Description
CUPID is a next-generation bolometric experiment to search for neutrinoless double-beta decay ($0\nu\beta\beta$) of $^{100}$Mo using Li$_2$MoO$_4$ scintillating crystals. It will operate at $\sim$10 mK in the existing CUORE cryostat at the Laboratori Nazionali del Gran Sasso in Italy. Each crystal will be facing two Ge-based bolometric light detectors for $\alpha$ rejection. In this work, we develop a statistical analysis, in a Frequentist and a Bayesian framework, to compute the discovery and the exclusion sensitivity of CUPID to the $0\nu\beta\beta$ half-life and to the effective Majorana neutrino mass. This computation is done numerically based on pseudo-experiments. We evaluate the sensitivity for various background indices and energy resolution. For the CUPID baseline scenario, with a background and an energy resolution of $1.0 \times 10^{-4}$ counts/keV/kg/yr and 5 keV FWHM at the Q-value, respectively, this results in a Bayesian exclusion sensitivity at 90% confidence interval of $\hat{T}_{1/2} > 1.6^{+0.6}_{-0.5} \times 10^{27} \ \mathrm{yr}$, corresponding to the effective Majorana neutrino mass of $\hat{m}_{\beta\beta} < \ 9.6$ -- $16.3 \ \mathrm{meV}$. In the Frequentist analysis, we obtain a discovery sensitivity at 3$\sigma$ of $\hat{T}_{1/2}= 1.0 \times 10^{27} \ \mathrm{yr}$, corresponding to $\hat{m}_{\beta\beta}= \ 12.2$ -- $20.6 \ \mathrm{meV}$.
| Collaboration you are representing | CUPID |
|---|
