Paper

Sensitivity of the CUPID experiment to \\(0\\nu\\beta\\beta\\) decay of \\(^{100}\\)Mo

Bucci, C, S Di Domizio, Ghislandi, S, Girola, M, Schmidt, B, Gotti, C, Raselli, G L, Pageot, M, Winslow, L A, Giachero, A, Maruyama, R H, Previtali, E, Hurst, M T, Dell'Oro, S, Mancarella, F, Puiu, A, Ressa, A, Cardani, L, D'Addabbo, A, Pochon, O, Helis, D L, Grant, C, Billard, J, Rosier, P, Barresi, A, Yang, J, Nutini, I, Juillard, A, Nastasi, M, Rappoldi, A, Bergé, L, Singh, V, L Ma, Brofferio, C, Chiesa, D, Yefremenko, V, Tozzi, D, Mei, Y, de Marcillac, P, Benussi, L, Buchynska, M, Sharma, V, De Jesus, M, Guillaumon, P V, Mazzola, E, Danevich, F A, Armatol, A, Cintas, D, Pozzi, S, Boldrini, V, Liu, Y, Ferri, E, Slocum, P, Liu, R, Huang, H Z, Torres, A, Ferri, F, Ferroni, F, Lisovenko, M, Tomei, C, Gras, P, Polakovic, T, Wang, G, Baudin, D, Wang, L, Creswick, R J, Campani, A, Wang, R, Zolotarova, A, Hansen, E V, Olivieri, E, Rossella, M, Morganti, S, Caracciolo, V, Fujikawa, B K, Mazzitelli, G, Rizzoli, R, Capelli, S, Giuliani, A, Drobizhev, A, Mas, Ph, Heeger, K M, Karapetrov, G, Kowalski, R, Sisti, M, Khalife, H, Marini, L, Mayer, D, Tomassini, S, Alfonso, K, Surukuchi, P T, Gorla, P, Nikkel, J, Pettinacci, V, Vetter, K J, Gascon, J, Franceschi, A, Barabash, A S, Xie, F, Cope

2026

Overview

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 1596 crystals at \\(\\sim\\)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 \\(\\alpha\\) rejection. We compute the discovery and the exclusion sensitivity of CUPID to \\(0\\nu\\beta\\beta\\) 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 \\times 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 \\(\\hat{T}_{1/2} > 1.6 \\times 10^{27} \\ \\mathrm{yr}\\), corresponding to the effective Majorana neutrino mass of \\(\\hat{m}_{\\beta\\beta} < \\ 9.6\\) -- \\(28 \\ \\mathrm{meV}\\). The Frequentist discovery sensitivity (3\\(\\sigma\\)) is \\(\\hat{T}_{1/2}= 1.0 \\times 10^{27} \\ \\mathrm{yr}\\), corresponding to \\(\\hat{m}_{\\beta\\beta}= \\ 12\\) -- \\(36 \\ \\mathrm{meV}\\).

• Publisher: Cornell University Library, arXiv.org
• Subject: Bayesian analysis / Beta decay / Bolometers / Crystals / Energy resolution / Neutrinos / Q values (nuclear physics) / Sensitivity