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First Result on the Neutrinoless Double- β Decay of Se82 with CUPID-0

Author(s)
Azzolini, O.; Barrera, M. T.; Beeman, J. W.; Bellini, F.; Beretta, M.; Biassoni, M.; Brofferio, C.; Bucci, C.; 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.; Canonica, Lucia; ... Show more Show less
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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 yr⁸²Se exposure, and we set the most stringent lower limit on the 0νββ ⁸²Se half-life T[subscript 1/2][superscript 0ν]>2.4×10²⁴  yr (90% credible interval), which corresponds to an effective Majorana neutrino mass m[subscript ββ] < (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[subscript -1.4][superscript +1.9])×10⁻³  counts/(keV kg yr), an unprecedented level for this technique.
Date issued
2018-06
URI
http://hdl.handle.net/1721.1/116138
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
D’Addabbo, A. et al. "First Result on the Neutrinoless Double- β Decay of Se82 with CUPID-0." Physical Review Letters 120, 23 (June 2018): 232502 © 2018 American Physical Society
Version: Final published version
ISSN
0031-9007
1079-7114

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