Abstract
We report new results from the search for neutrinoless double-beta decay in 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 ) in the decay region of interest and, with a total exposure of 372.5 kg yr, we attain a median exclusion sensitivity of . We find no evidence for decay and set a 90% credibility interval Bayesian lower limit of on the half-life for this process. In the hypothesis that 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.
- Received 23 December 2019
- Revised 11 February 2020
- Accepted 27 February 2020
DOI:https://doi.org/10.1103/PhysRevLett.124.122501
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