# First Results from CUORE: A Search for Lepton Number Violation via $0\nu\beta\beta$ Decay of $^{130}$Te

Abstract : The CUORE experiment, a ton-scale cryogenic bolometer array, recently began operation at the Laboratori Nazionali del Gran Sasso in Italy. The array represents a significant advancement in this technology, and in this work we apply it for the first time to a high-sensitivity search for a lepton-number-violating process: Te130 neutrinoless double-beta decay. Examining a total TeO2 exposure of 86.3 kg yr, characterized by an effective energy resolution of (7.7±0.5)  keV FWHM and a background in the region of interest of (0.014±0.002)  counts/(keV kg yr), we find no evidence for neutrinoless double-beta decay. Including systematic uncertainties, we place a lower limit on the decay half-life of T1/20ν(Te130)>1.3×1025  yr (90% C.L.); the median statistical sensitivity of this search is 7.0×1024  yr. Combining this result with those of two earlier experiments, Cuoricino and CUORE-0, we find T1/20ν(Te130)>1.5×1025  yr (90% C.L.), which is the most stringent limit to date on this decay. Interpreting this result as a limit on the effective Majorana neutrino mass, we find mββ<(110-520)  meV, where the range reflects the nuclear matrix element estimates employed.
Keywords :
Document type :
Journal articles
Domain :

https://hal.archives-ouvertes.fr/hal-01758342
Contributor : Inspire Hep <>
Submitted on : Wednesday, April 4, 2018 - 2:04:05 PM
Last modification on : Wednesday, October 21, 2020 - 1:47:10 AM

### Citation

C. Alduino, K. Alfonso, E. Andreotti, C. Arnaboldi, F.T. Avignone, et al.. First Results from CUORE: A Search for Lepton Number Violation via $0\nu\beta\beta$ Decay of $^{130}$Te. Phys.Rev.Lett., 2018, 120 (13), pp.132501. ⟨10.1103/PhysRevLett.120.132501⟩. ⟨hal-01758342⟩

Record views