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  • First Results from CUORE: A Search for Lepton Number Violation via 0νββ Decay of ^{130}Te
    Alduino, C; Alessandria, F; Andreotti, E; Avignone, F T; Balata, M; Barucci, M; Beeman, J W; Bellini, F; Benato, G; Bersani, A; Biare, D; Branca, A; Brofferio, C; Bryant, A; Bucci, C; Bulfon, C; Camacho, A; Caminata, A; Canonica, L; Cao, X G; Capodiferro, M; Cardani, L; Casali, N; Ceruti, G; Chiesa, D; Clemenza, M; Copello, S; Cosmelli, C; Cremonesi, O; Cushman, J S; D'Aguanno, D; Datskov, V; Davis, C J; Del Corso, F; Dell'Oro, S; Di Vacri, M L; Di Paolo, L; Drobizhev, A; Faccini, R; Faverzani, M; Ferri, E; Ferroni, F; Fiorini, E; Franceschi, M A; Freedman, S J; Giachero, A; Gironi, L; Giuliani, A; Goett, J; Guandalini, C; Guerzoni, M; Gutierrez, T D; Han, K; Hansen, E V; Heeger, K M; Ioannucci, L; Kadel, R; Keppel, G; Kogler, L; Ligi, C; Liu, X; Maiano, C; Maino, M; Maruyama, R H; Moggi, N; Mosteiro, P J; Napolitano, T; Novati, V; O'Donnell, T; Olcese, M; Orlandi, D; Pelosi, A; Pessina, G; Pira, C; Pirro, S; Previtali, E; Risegari, L; Rusconi, C; Sala, E; Salvioni, C; Sangiorgio, S; Schmidt, B; Scielzo, N D; Singh, V; Sisti, M; Smith, A R; Stivanello, F; Tatananni, L; Tenconi, M; Terranova, F; Tessaro, M; Vignati, M; Wagaarachchi, S L; Wang, B S; Wang, H W; Wilson, K; Winslow, L A; Wise, T; Zanotti, L; Zhu, B X

    Physical review letters, 2018-Mar-30, Letnik: 120, Številka: 13
    Journal Article

    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: ^{130}Te neutrinoless double-beta decay. Examining a total TeO_{2} 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 T_{1/2}^{0ν}(^{130}Te)>1.3×10^{25}  yr (90% C.L.); the median statistical sensitivity of this search is 7.0×10^{24}  yr. Combining this result with those of two earlier experiments, Cuoricino and CUORE-0, we find T_{1/2}^{0ν}(^{130}Te)>1.5×10^{25}  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 m_{ββ}<(110-520)  meV, where the range reflects the nuclear matrix element estimates employed.

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