CUPID-0, an array of Zn82Se cryogenic calorimeters, was the first medium-scale demonstrator of the scintillating bolometers' technology. The first project phase (March 2017-December 2018) allowed the most stringent limit on the neutrinoless double beta decay half-life of the isotope of interest, 82Se, to be set. After a six month long detector upgrade, CUPID-0 began its second and last phase (June 2019-February 2020). In this Letter, we describe the search for neutrinoless double beta decay of 82Se with a total exposure (phase I thorn II) of 8.82 kg yr-1 of isotope. We set a limit on the half-life of 82Se to the ground state of 82Kr of T0z/ 1/2(82Se) > 4.6 x 1024 yr (90% credible interval), corresponding to an effective Majorana neutrino mass m beta beta < (263-545) meV. We also set the most stringent lower limits on the neutrinoless decays of 82Se to the 0 thorn 1 , 2 thorn 1 , and 2 thorn 2 excited states of 82Kr, finding 1.8 x 1023 yr, 3.0 x 1023 yr, and 3.2 x 1023 yr (90% credible interval) respectively.
Final result on the neutrinoless double beta decay of ^{82}Se with CUPID-0 / 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; Chiesa, D; Clemenza, M; Colantoni, I; Cremonesi, O; Cruciani, A; D'Addabbo, A; Dafinei, I; De Dominicis, F; 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. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 129:11(2022). [10.1103/PhysRevLett.129.111801]
Final result on the neutrinoless double beta decay of ^{82}Se with CUPID-0
Bellini, F;Vignati, M;
2022
Abstract
CUPID-0, an array of Zn82Se cryogenic calorimeters, was the first medium-scale demonstrator of the scintillating bolometers' technology. The first project phase (March 2017-December 2018) allowed the most stringent limit on the neutrinoless double beta decay half-life of the isotope of interest, 82Se, to be set. After a six month long detector upgrade, CUPID-0 began its second and last phase (June 2019-February 2020). In this Letter, we describe the search for neutrinoless double beta decay of 82Se with a total exposure (phase I thorn II) of 8.82 kg yr-1 of isotope. We set a limit on the half-life of 82Se to the ground state of 82Kr of T0z/ 1/2(82Se) > 4.6 x 1024 yr (90% credible interval), corresponding to an effective Majorana neutrino mass m beta beta < (263-545) meV. We also set the most stringent lower limits on the neutrinoless decays of 82Se to the 0 thorn 1 , 2 thorn 1 , and 2 thorn 2 excited states of 82Kr, finding 1.8 x 1023 yr, 3.0 x 1023 yr, and 3.2 x 1023 yr (90% credible interval) respectively.| File | Dimensione | Formato | |
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