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Search for Neutrinoless Double-Beta Decay of Te 130 with CUORE-0

  • Author(s): Alfonso, K;
  • Artusa, DR;
  • Avignone, FT;
  • Azzolini, O;
  • Balata, M;
  • Banks, TI;
  • Bari, G;
  • Beeman, JW;
  • Bellini, F;
  • Bersani, A;
  • Biassoni, M;
  • Brofferio, C;
  • Bucci, C;
  • Caminata, A;
  • Canonica, L;
  • Cao, XG;
  • Capelli, S;
  • Cappelli, L;
  • Carbone, L;
  • Cardani, L;
  • Casali, N;
  • Cassina, L;
  • Chiesa, D;
  • Chott, N;
  • Clemenza, M;
  • Copello, S;
  • Cosmelli, C;
  • Cremonesi, O;
  • Creswick, RJ;
  • Cushman, JS;
  • Dafinei, I;
  • Dally, A;
  • Dell'Oro, S;
  • Deninno, MM;
  • Di Domizio, S;
  • Di Vacri, ML;
  • Drobizhev, A;
  • Ejzak, L;
  • Fang, DQ;
  • Faverzani, M;
  • Fernandes, G;
  • Ferri, E;
  • Ferroni, F;
  • Fiorini, E;
  • Freedman, SJ;
  • Fujikawa, BK;
  • Giachero, A;
  • Gironi, L;
  • Giuliani, A;
  • Gorla, P;
  • Gotti, C;
  • Gutierrez, TD;
  • Haller, EE;
  • Han, K;
  • Hansen, E;
  • Heeger, KM;
  • Hennings-Yeomans, R;
  • Hickerson, KP;
  • Huang, HZ;
  • Kadel, R;
  • Keppel, G;
  • Kolomensky, YG;
  • Lim, KE;
  • Liu, X;
  • Ma, YG;
  • Maino, M;
  • Martinez, M;
  • Maruyama, RH;
  • Mei, Y;
  • Moggi, N;
  • Morganti, S;
  • Nisi, S;
  • Nones, C;
  • Norman, EB;
  • Nucciotti, A;
  • O'Donnell, T;
  • Orio, F;
  • Orlandi, D;
  • Ouellet, JL;
  • Pagliarone, CE;
  • Pallavicini, M;
  • Palmieri, V;
  • Pattavina, L;
  • Pavan, M;
  • Pedretti, M;
  • Pessina, G;
  • Pettinacci, V;
  • Piperno, G;
  • Pirro, S;
  • Pozzi, S;
  • Previtali, E;
  • Rosenfeld, C;
  • Rusconi, C;
  • Sala, E;
  • Sangiorgio, S;
  • Santone, D;
  • Scielzo, ND;
  • Sisti, M;
  • Smith, AR;
  • Taffarello, L
  • et al.
Abstract

We report the results of a search for neutrinoless double-beta decay in a 9.8 kg yr exposure of Te130 using a bolometric detector array, CUORE-0. The characteristic detector energy resolution and background level in the region of interest are 5.1±0.3keV FWHM and 0.058±0.004(stat)±0.002(syst)counts/(keVkgyr), respectively. The median 90% C.L. lower-limit half-life sensitivity of the experiment is 2.9×1024yr and surpasses the sensitivity of previous searches. We find no evidence for neutrinoless double-beta decay of Te130 and place a Bayesian lower bound on the decay half-life, T1/20ν>2.7×1024yr at 90% C.L. Combining CUORE-0 data with the 19.75 kg yr exposure of Te130 from the Cuoricino experiment we obtain T1/20ν>4.0×1024yr at 90% C.L. (Bayesian), the most stringent limit to date on this half-life. Using a range of nuclear matrix element estimates we interpret this as a limit on the effective Majorana neutrino mass, mββ<270-760meV.

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