CUPID-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 set the most stringent limit on the half-life of Se82 0νDBD: T1/20ν>3.5×1024 yr (90% credible interval), corresponding to mββ<(311-638) meV depending on the nuclear matrix element calculations.

Azzolini, O., Beeman, J., Bellini, F., Beretta, M., Biassoni, M., Brofferio, C., et al. (2019). Final Result of CUPID-0 Phase-I in the Search for the Se 82 Neutrinoless Double- β Decay. PHYSICAL REVIEW LETTERS, 123(3) [10.1103/PhysRevLett.123.032501].

Final Result of CUPID-0 Phase-I in the Search for the Se 82 Neutrinoless Double- β Decay

Beretta, M.;Biassoni, M.;Brofferio, C.;Capelli, S.;Carniti, P.;Chiesa, D.;Clemenza, M.;Cremonesi, O.;Gironi, L.;Gotti, C.;Nastasi, M.;Pagnanini, L.;Pattavina, L.;Pavan, M.;Pessina, G.;Pozzi, S.;Previtali, E.;Puiu, A.;
2019

Abstract

CUPID-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 set the most stringent limit on the half-life of Se82 0νDBD: T1/20ν>3.5×1024 yr (90% credible interval), corresponding to mββ<(311-638) meV depending on the nuclear matrix element calculations.
Articolo in rivista - Articolo scientifico
Bolometers; Double Beta Decay; Rare Events; Neutrinos
English
2019
123
3
032501
reserved
Azzolini, O., Beeman, J., Bellini, F., Beretta, M., Biassoni, M., Brofferio, C., et al. (2019). Final Result of CUPID-0 Phase-I in the Search for the Se 82 Neutrinoless Double- β Decay. PHYSICAL REVIEW LETTERS, 123(3) [10.1103/PhysRevLett.123.032501].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/236750
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