We report the result of the search for neutrinoless double beta decay of 82Se obtained with CUPID-0, the first large array of scintillating Zn82Se cryogenic calorimeters implementing particle identification. We observe no signal in a 1.83 kg yr 82Se exposure, and we set the most stringent lower limit on the 0vββ 82Se half-life T0v 1=2 > 2.4 × 1024 yr (90% credible interval), which corresponds to an effective Majorana neutrino mass mββ < (376-770) meV depending on the nuclear matrix element calculations. The heat-light readout provides a powerful tool for the rejection of α particles and allows us to suppress the background in the region of interest down to (3.6 +1.9-1.4) × 10-3counts=(keV kg yr), an unprecedented level for this technique.
First result on the neutrinoless double-β decay of 82se with CUPID-0 / Azzolini, O.; Barrera, M. T.; Beeman, J. W.; Bellini, F.; Beretta, M.; Biassoni, M.; Brofferio, C.; Bucci, C.; Canonica, L.; Capelli, S.; Cardani, L.; Carniti, P.; Casali, N.; Cassina, L.; Clemenza, M.; Cremonesi, O.; Cruciani, A.; D'Addabbo, A.; Dafinei, I.; Di Domizio, S.; Ferroni, F.; Gironi, L.; Giuliani, A.; Gorla, P.; Gotti, C.; Keppel, G.; Marini, L.; Martinez, M.; Morganti, S.; Nagorny, S.; Nastasi, M.; Nisi, S.; Nones, C.; Orlandi, D.; Pagnanini, L.; Pallavicini, M.; Palmieri, V.; Pattavina, L.; Pavan, M.; Pessina, G.; Pettinacci, V.; Pirro, S.; Pozzi, S.; Previtali, E.; Puiu, A.; Reindl, F.; Rusconi, C.; Schäffner, K.; Tomei, C.; Vignati, M.; Zolotarova, A. S.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 120:23(2018). [10.1103/PhysRevLett.120.232502]
First result on the neutrinoless double-β decay of 82se with CUPID-0
Bellini, F.
;Cardani, L.;Casali, N.;Cruciani, A.;D'Addabbo, A.;Dafinei, I.;Ferroni, F.;Martinez, M.;Pagnanini, L.;Pettinacci, V.;Vignati, M.;
2018
Abstract
We report the result of the search for neutrinoless double beta decay of 82Se obtained with CUPID-0, the first large array of scintillating Zn82Se cryogenic calorimeters implementing particle identification. We observe no signal in a 1.83 kg yr 82Se exposure, and we set the most stringent lower limit on the 0vββ 82Se half-life T0v 1=2 > 2.4 × 1024 yr (90% credible interval), which corresponds to an effective Majorana neutrino mass mββ < (376-770) meV depending on the nuclear matrix element calculations. The heat-light readout provides a powerful tool for the rejection of α particles and allows us to suppress the background in the region of interest down to (3.6 +1.9-1.4) × 10-3counts=(keV kg yr), an unprecedented level for this technique.| File | Dimensione | Formato | |
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