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 T^1/2>1.6×10^27yr, corresponding to the effective Majorana neutrino mass of m^ββ<9.6–28meV. The Frequentist discovery sensitivity (3σ) is T^1/2=1.0×10^27yr, corresponding to m^ββ=12 – 36meV.
Zucchelli, S., Zolotarova, A., Zhu, T., Zarytskyy, M., Umatov, V., Yefremenko, V., et al. (2026). Sensitivity of the CUPID experiment to 0νββ decay of 100Mo. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 86(6) [10.1140/epjc/s10052-026-15296-w].
Sensitivity of the CUPID experiment to 0νββ decay of 100Mo
Trotta D.;Sisti M.;Quitadamo S.;Previtali E.;Pavan M.;Pattavina L.;Nastasi M.;Mazzola E.;Gotti C.;Gironi L.;Giachero A.;Faverzani M.;Chiesa D.;Capelli S.;Brofferio C.;Barresi A.;
2026
Abstract
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 T^1/2>1.6×10^27yr, corresponding to the effective Majorana neutrino mass of m^ββ<9.6–28meV. The Frequentist discovery sensitivity (3σ) is T^1/2=1.0×10^27yr, corresponding to m^ββ=12 – 36meV.
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