Constraints on lepton number violation with the 2 tonne · year CUORE dataset.
basic_science · Level V
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- Record sourced from PubMed, PMID 41100587.
- Also identified by DOI 10.1126/science.adp6474.
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Abstract
Matter-antimatter asymmetry underlines the incompleteness of the current understanding of particle physics. Neutrinoless double-beta decay (0νββ) may help explain this asymmetry while unveiling the Majorana nature of the neutrino. The CUORE (Cryogenic Underground Observatory for Rare Events) experiment searches for 0νββ of <sup>130</sup>Te using a tonne-scale cryogenic calorimeter operated at milli-kelvin temperatures. We report no evidence of 0νββ and place a lower limit on the half-life of <i>T</i><sub>1/2</sub> > 3.5 × 10<sup>25</sup> years (90% credibility interval) with over 2 tonne·years of TeO<sub>2</sub> exposure. The tools and techniques developed for this result and the 5-year stable operation of nearly 1000 detectors demonstrate crucial infrastructure for future-generation experiments capable of searching for 0νββ across multiple isotopes.