: We report on the results obtained with the global CUPID-0 background model, which combines the data collected in the two measurement campaigns for a total exposure of 8.82 kg×yr of ^{82}Se. We identify with improved precision the background sources within the 3 MeV energy region, where neutrinoless double β decay of ^{82}Se and ^{100}Mo is expected, making more solid the foundations for the background budget of the next-generation CUPID experiment. Relying on the excellent data reconstruction, we measure the two-neutrino double β-decay half-life of ^{82}Se with unprecedented accuracy: T_{1/2}^{2ν}=[8.69±0.05(stat)_{-0.06}^{+0.09}(syst)]×10^{19} yr.
Measurement of the 2νββ Decay Half-Life of ^{82}Se with the Global CUPID-0 Background Model / Azzolini, O; Beeman, J W; Bellini, F; Beretta, M; Biassoni, M; Brofferio, C; Bucci, C; Capelli, S; Caracciolo, V; Cardani, L; Carniti, P; Casali, N; Celi, E; Chiesa, D; Clemenza, M; Colantoni, I; Cremonesi, O; Cruciani, A; D'Addabbo, A; Dafinei, I; Di Domizio, S; Dompè, V; Fantini, G; Ferroni, F; Gironi, L; Giuliani, A; Gorla, P; Gotti, C; Keppel, G; Kotila, J; Martinez, M; Nagorny, S 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; Ressa, A; Rusconi, C; Schäffner, K; Tomei, C; Vignati, M; Zolotarova, A S. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 131:22(2023). [10.1103/PhysRevLett.131.222501]
Measurement of the 2νββ Decay Half-Life of ^{82}Se with the Global CUPID-0 Background Model
Bellini, F;Ressa, A;Vignati, M;
2023
Abstract
: We report on the results obtained with the global CUPID-0 background model, which combines the data collected in the two measurement campaigns for a total exposure of 8.82 kg×yr of ^{82}Se. We identify with improved precision the background sources within the 3 MeV energy region, where neutrinoless double β decay of ^{82}Se and ^{100}Mo is expected, making more solid the foundations for the background budget of the next-generation CUPID experiment. Relying on the excellent data reconstruction, we measure the two-neutrino double β-decay half-life of ^{82}Se with unprecedented accuracy: T_{1/2}^{2ν}=[8.69±0.05(stat)_{-0.06}^{+0.09}(syst)]×10^{19} yr.| File | Dimensione | Formato | |
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