Final result of CUPID-0 phase-I in the search for the $^{82}$Se Neutrinoless Double-$\beta$ Decay
- Azzolini, O.
- Beeman, J.W.
- Bellini, F.
- Beretta, M.
- Biassoni, M.
- Brofferio, C.
- Bucci, C.
- Capelli, S.
- Cardani, L.
- Carniti, P.
- Casali, N.
- Chiesa, D.
- Clemenza, M.
- Cremonesi, O.
- Cruciani, A.
- Dafinei, I.
- Di Domizio, S.
- Ferroni, F.
- Gironi, L.
- Giuliani, A.
- Gorla, P.
- Gotti, C.
- Keppel, G.
- Martinez, M.
- Nagorny, S.
- Nastasi, M.
- Nisi, S.
- Nones, C.
- Orlandi, D.
- Pagnanini, L.
- Pallavicini, M.
- Pattavina, L.
- Pavan, M.
- Pessina, G.
- Pettinacci, V.
- Pirro, S.
- Pozzi, S.
- Previtali, E.
- Puiu, A.
- Rusconi, C.
- Schäffner, K.
- Tomei, C.
- Vignati, M.
- Zolotarova, A.S.
DOIAbstract
International audienceCUPID-0 is the first pilot experiment of CUPID, a next-generation project for the measurement of neutrinoless double beta decay (0νDBD) with scintillating bolometers. The detector, consisting of 24 enriched and 2 natural ZnSe crystals, has been taking data at Laboratori Nazionali del Gran Sasso from June 2017 to December 2018, collecting a Se82 exposure of 5.29 kg×yr. In this Letter we present the phase-I results in the search for 0νDBD. We demonstrate that the technology implemented by CUPID-0 allows us to reach the lowest background for calorimetric experiments: (3.5-0.9+1.0)×10-3 counts/(keV kg yr). Monitoring 3.88×1025 Se82 nuclei×yr we reach a 90% credible interval median sensitivity of T1/20ν>5.0×1024 yr and s...
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