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Measurement of the 2νββ Decay Half-Life of ^{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;
  • Camilleri, J;
  • Caminata, A;
  • Campani, A;
  • Canonica, L;
  • Cao, XG;
  • Capelli, S;
  • Cappelli, L;
  • Cardani, L;
  • Carniti, P;
  • Casali, N;
  • Chiesa, D;
  • Clemenza, M;
  • Copello, S;
  • Cosmelli, C;
  • Cremonesi, O;
  • Creswick, RJ;
  • D'Addabbo, A;
  • 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;
  • Fu, SH;
  • 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, L;
  • Ma, YG;
  • Marini, L;
  • Maruyama, RH;
  • Mayer, D;
  • Mei, Y;
  • Moggi, N;
  • Morganti, S;
  • Napolitano, T;
  • Nastasi, M;
  • Nikkel, J;
  • Nones, C;
  • Norman, EB;
  • Nucciotti, A;
  • Nutini, I;
  • O'Donnell, T;
  • Ouellet, JL;
  • Pagan, S;
  • 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;
  • Vetter, KJ;
  • Vignati, M;
  • Wagaarachchi, SL;
  • Wang, BS;
  • Welliver, B;
  • Wilson, J;
  • Wilson, K;
  • Winslow, LA;
  • Zimmermann, S;
  • Zucchelli, S
  • et al.
Abstract

We measured two-neutrino double beta decay of ^{130}Te using an exposure of 300.7 kg yr accumulated with the CUORE detector. Using a Bayesian analysis to fit simulated spectra to experimental data, it was possible to disentangle all the major background sources and precisely measure the two-neutrino contribution. The half-life is in agreement with past measurements with a strongly reduced uncertainty: T_{1/2}^{2ν}=7.71_{-0.06}^{+0.08}(stat)_{-0.15}^{+0.12}(syst)×10^{20}  yr. This measurement is the most precise determination of the ^{130}Te 2νββ decay half-life to date.

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