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., et al.. - 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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