Resumen: 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-numberviolating process: 130Te neutrinoless double-beta decay. Examining a total TeO2 exposure of 86.3 kg yr, characterized by an effective energy resolution of d7.7 ± 0.5T keV FWHM and a background in the region of interest of d0.014 ± 0.002T counts=dkeV kg yrT, we find no evidence for neutrinoless double-beta decay. Including systematic uncertainties, we place a lower limit on the decay half-life of T0¿ 1/2 (130Te) > 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 T0¿ 1/2 (130Te) > 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 mßß < (110 - 520) meV, where the range reflects the nuclear matrix element estimates employed. Idioma: Inglés DOI: 10.1103/PhysRevLett.120.132501 Año: 2018 Publicado en: Physical Review Letters 120, 13 (2018), 132501 [8 pp] ISSN: 0031-9007 Factor impacto JCR: 9.227 (2018) Categ. JCR: PHYSICS, MULTIDISCIPLINARY rank: 6 / 81 = 0.074 (2018) - Q1 - T1 Factor impacto SCIMAGO: 3.571 - Physics and Astronomy (miscellaneous) (Q1)