First Result on the Neutrinoless Double- β Decay of Se82 with CUPID-0
Name
PhysRevLett.120.232502.pdf
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1.97 MB
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Checksum (MD5)
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Author(s)
Azzolini, O.
Barrera, M. T.
Beeman, J. W.
Bellini, F.
Beretta, M.
Biassoni, M.
Brofferio, C.
Bucci, C.
Capelli, S.
Cardani, L.
Date Issued
June 2018
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
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.120.232502
