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

C. Alduino K. Alfonso E. Andreotti C. Arnaboldi F.T. Avignone O. Azzolini I. Bandac T.I. Banks G. Bari M. Barucci J.W. Beeman F. Bellini G. Benato A. Bersani D. Biare M. Biassoni A. Branca C. Brofferio A. Bryant A. Buccheri C. Bucci C. Bulfon A. Camacho A. Caminata L. Canonica X.G. Cao S. Capelli M. Capodiferro L. Cappelli L. Cardani P. Carniti M. Carrettoni N. Casali L. Cassina G. Ceruti A. Chiarini D. Chiesa N. Chott M. Clemenza S. Copello C. Cosmelli O. Cremonesi C. Crescentini R.J. Creswick J.S. Cushman A. d'Addabbo D. d'Aguanno I. Dafinei C.J. Davis F. del Corso S. Dell'Oro M.M. Deninno S. Di Domizio M.L. Di Vacri L. Di Paolo A. Drobizhev L. Ejzak R. Faccini D.Q. Fang M. Faverzani E. Ferri F. Ferroni E. Fiorini M.A. Franceschi S.J. Freedman B.K. Fujikawa A. Giachero L. Gironi A. Giuliani 1 L. Gladstone J. Goett P. Gorla C. Gotti C. Guandalini M. Guerzoni T.D. Gutierrez E.E. Haller K. Han E.V. Hansen K.M. Heeger R. Hennings-Yeomans K.P. Hickerson H.Z. Huang M. Iannone R. Kadel G. Keppel L. Kogler Yu.G. Kolomensky A. Leder C. Ligi K.E. Lim Y.G. Ma C. Maiano L. Marini M. Martinez C. Martinez Amaya R.H. Maruyama Y. Mei N. Moggi S. Morganti P.J. Mosteiro S.S. Nagorny T. Napolitano M. Nastasi C. Nones 2 E.B. Norman V. Novati 1 A. Nucciotti I. Nutini T. O'Donnell E. Olivieri F. Orio J.L. Ouellet C.E. Pagliarone M. Pallavicini V. Palmieri L. Pattavina M. Pavan M. Pedretti A. Pelosi G. Pessina V. Pettinacci G. Piperno C. Pira S. Pirro S. Pozzi E. Previtali F. Reindl F. Rimondi L. Risegari C. Rosenfeld C. Rusconi M. Sakai E. Sala C. Salvioni S. Sangiorgio D. Santone D. Schaeffer B. Schmidt J. Schmidt N.D. Scielzo V. Singh M. Sisti A.R. Smith F. Stivanello L. Taffarello M. Tenconi 1 F. Terranova C. Tomei G. Ventura M. Vignati S.L. Wagaarachchi B.S. Wang H.W. Wang B. Welliver J. Wilson K. Wilson L.A. Winslow T. Wise L. Zanotti G.Q. Zhang B.X. Zhu S. Zimmermann S. Zucchelli
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.
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Submitted on : Wednesday, April 4, 2018 - 2:04:05 PM
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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⟩

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