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Improved Limit on Neutrinoless Double-Beta Decay in ^{130} Te with CUORE.

  • Author(s): Adams, DQ;
  • Alduino, C;
  • Alfonso, K;
  • Avignone, FT;
  • Azzolini, O;
  • Bari, G;
  • Bellini, F;
  • Benato, G;
  • Biassoni, M;
  • Branca, A;
  • Brofferio, C;
  • Bucci, C;
  • Caminata, A;
  • Campani, A;
  • Canonica, L;
  • Cao, XG;
  • Capelli, S;
  • Cappelli, L;
  • Cardani, L;
  • Carniti, P;
  • Casali, N;
  • Chiesa, D;
  • Chott, N;
  • Clemenza, M;
  • Copello, S;
  • Cosmelli, C;
  • Cremonesi, O;
  • Creswick, RJ;
  • D'Addabbo, A;
  • D'Aguanno, D;
  • Dafinei, I;
  • Davis, CJ;
  • Dell'Oro, S;
  • Di Domizio, S;
  • Dompè, V;
  • Fang, DQ;
  • Fantini, G;
  • Faverzani, M;
  • Ferri, E;
  • Ferroni, F;
  • Fiorini, E;
  • Franceschi, MA;
  • Freedman, SJ;
  • Fujikawa, BK;
  • Giachero, A;
  • Gironi, L;
  • Giuliani, A;
  • Gorla, P;
  • Gotti, C;
  • Gutierrez, TD;
  • Han, K;
  • Heeger, KM;
  • Huang, RG;
  • Huang, HZ;
  • Johnston, J;
  • Keppel, G;
  • Kolomensky, Yu G;
  • Ligi, C;
  • Ma, YG;
  • Ma, L;
  • Marini, L;
  • Maruyama, RH;
  • Mei, Y;
  • Moggi, N;
  • Morganti, S;
  • Napolitano, T;
  • Nastasi, M;
  • Nikkel, J;
  • Nones, C;
  • Norman, EB;
  • Novati, V;
  • Nucciotti, A;
  • Nutini, I;
  • O'Donnell, T;
  • Ouellet, JL;
  • Pagliarone, CE;
  • Pagnanini, L;
  • Pallavicini, M;
  • Pattavina, L;
  • Pavan, M;
  • Pessina, G;
  • Pettinacci, V;
  • Pira, C;
  • Pirro, S;
  • Pozzi, S;
  • Previtali, E;
  • Puiu, A;
  • Rosenfeld, C;
  • Rusconi, C;
  • Sakai, M;
  • Sangiorgio, S;
  • Schmidt, B;
  • Scielzo, ND;
  • Sharma, V;
  • Singh, V;
  • Sisti, M;
  • Speller, D;
  • Surukuchi, PT;
  • Taffarello, L;
  • Terranova, F;
  • Tomei, C;
  • Vignati, M;
  • Wagaarachchi, SL;
  • Wang, BS;
  • Welliver, B;
  • Wilson, J;
  • Wilson, K;
  • Winslow, LA;
  • Zanotti, L;
  • Zimmermann, S;
  • Zucchelli, S;
  • CUORE Collaboration
  • et al.
Abstract

We report new results from the search for neutrinoless double-beta decay in ^{130} Te with the CUORE detector. This search benefits from a fourfold increase in exposure, lower trigger thresholds, and analysis improvements relative to our previous results. We observe a background of (1.38±0.07)×10^{-2}  counts/(keV kg yr)) in the 0νββ decay region of interest and, with a total exposure of 372.5 kg yr, we attain a median exclusion sensitivity of 1.7×10^{25}  yr. We find no evidence for 0νββ decay and set a 90% credibility interval Bayesian lower limit of 3.2×10^{25}  yr on the ^{130} Te half-life for this process. In the hypothesis that 0νββ decay is mediated by light Majorana neutrinos, this results in an upper limit on the effective Majorana mass of 75-350 meV, depending on the nuclear matrix elements used.

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