Measurement of the 2νββ Decay Half-Life of Te 130 with CUORE

Adams, D; Alduino, C; Alfonso, K; Avignone, F; 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, X; Capelli, S; Cappelli, L; Cardani, L; Carniti, P; Casali, N; Chiesa, D; Clemenza, M; Copello, S; Cosmelli, C; Cremonesi, O; Creswick, R; D'Addabbo, A; Dafinei, I; Davis, C; Dell'Oro, S; Di Domizio, S; Dompe, V; Fang, D; Fantini, G; Faverzani, M; Ferri, E; Ferroni, F; Fiorini, E; Franceschi, M; Freedman, S; S. H., F; Fujikawa, B; Giachero, A; Gironi, L; Giuliani, A; Gorla, P; Gotti, C; Gutierrez, T; Han, K; Heeger, K; Huang, R; Huang, H; Johnston, J; Keppel, G; Kolomensky, Y; Ligi, C; Ma, L; Y. G., M; Marini, L; Maruyama, R; Mayer, D; Mei, Y; Moggi, N; Morganti, S; Napolitano, T; Nastasi, M; Nikkel, J; Nones, C; Norman, E; Nucciotti, A; Nutini, I; O'Donnell, T; Ouellet, J; Pagan, S; Pagliarone, C; 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, N; Sharma, V; Singh, V; Sisti, M; Speller, D; Surukuchi, P; Taffarello, L; Terranova, F; Tomei, C; Vetter, K; Vignati, M; Wagaarachchi, S; Wang, B; Welliver, B; Wilson, J; Wilson, K; Winslow, L; Zimmermann, S; Zucchelli, S

doi:10.1103/PhysRevLett.126.171801

We measured two-neutrino double beta decay of Te130 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: T1/22ν=7.71-0.06+0.08(stat)-0.15+0.12(syst)×1020 yr. This measurement is the most precise determination of the Te130 2νββ decay half-life to date.

Adams, D., Alduino, C., Alfonso, K., Avignone, F., Azzolini, O., Bari, G., et al. (2021). Measurement of the 2νββ Decay Half-Life of Te 130 with CUORE. PHYSICAL REVIEW LETTERS, 126(17) [10.1103/PhysRevLett.126.171801].