Improved Limit on Neutrinoless Double-Beta Decay in ^{130} Te with CUORE
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PhysRevLett.124.122501.pdf
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Author(s)
Adams, D. Q.
Alduino, C.
Alfonso, K.
Avignone, F. T.
Azzolini, O.
Bari, G.
Bellini, F.
Benato, G.
Biassoni, M.
Branca, A.
Date Issued
March 2020
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Adams, D. Q., et al. "Improved Limit on Neutrinoless Double-Beta Decay in ^{130} Te with CUORE." Physical Review Letters, 124, 12 (March 2020): 122501. © 2020 American Physical Society
Version
Final published version
Abstract
We report new results from the search for neutrinoless double-beta decay in ^{130} Te with the CUORE detector. This search benefits from a fourfold increase in exposure, lower trigger thresholds, and analysis improvements relative to our previous results. We observe a background of (1.38±0.07)×10^{-2} counts/(keV kg yr)) in the 0νββ decay region of interest and, with a total exposure of 372.5 kg yr, we attain a median exclusion sensitivity of 1.7×10^{25} yr. We find no evidence for 0νββ decay and set a 90% credibility interval Bayesian lower limit of 3.2×10^{25} yr on the ^{130} Te half-life for this process. In the hypothesis that 0νββ decay is mediated by light Majorana neutrinos, this results in an upper limit on the effective Majorana mass of 75–350 meV, depending on the nuclear matrix elements used.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.124.122501
