| Literature DB >> 31386478 |
O Azzolini1, J W Beeman2, F Bellini3,4, M Beretta5,6, M Biassoni6, C Brofferio5,6, C Bucci7, S Capelli5,6, L Cardani4, P Carniti5,6, N Casali4, D Chiesa5,6, M Clemenza5,6, O Cremonesi6, A Cruciani4, I Dafinei4, S Di Domizio8,9, F Ferroni4,10, L Gironi5,6, A Giuliani11,12, P Gorla7, C Gotti5,6, G Keppel1, M Martinez3,4, S Nagorny7,10, M Nastasi5,6, S Nisi7, C Nones13, D Orlandi7, L Pagnanini5,6, M Pallavicini8,9, L Pattavina7, M Pavan5,6, G Pessina6, V Pettinacci4, S Pirro7, S Pozzi5,6, E Previtali5,6, A Puiu5, C Rusconi7,14, K Schäffner7,10, C Tomei4, M Vignati4, A S Zolotarova13.
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 ^{82}Se 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 3.88×10^{25} ^{82}Se nuclei×yr we reach a 90% credible interval median sensitivity of T_{1/2}^{0ν}>5.0×10^{24} yr and set the most stringent limit on the half-life of ^{82}Se 0νDBD: T_{1/2}^{0ν}>3.5×10^{24} yr (90% credible interval), corresponding to m_{ββ}<(311-638) meV depending on the nuclear matrix element calculations.Year: 2019 PMID： 31386478 DOI： 10.1103/PhysRevLett.123.032501
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161