Measurement of the 2\(\nu\beta\beta\) Decay Half-life of \(^{130}\)Te with CUORE

• Published in: arXiv.org 2021-05
• Main Authors: Collaboration, CUORE, Adams, D Q, Alduino, C, Alfonso, K, Avignone, F T, Azzolini, O, Bari, G, Bellini, F, Benato, G, Biassoni, M, Branca, A, Brofferio, C, Bucci, C, Camilleri, J, Caminata, A, Campani, A, Canonica, L, Capelli, S, Cappelli, L, Cardani, L, Carniti, P, Casali, N, Chiesa, D, Clemenza, M, Copello, S, Cosmelli, C, Cremonesi, O, Creswick, R J, D'Addabbo, A, Dafinei, I, Davis, C J, Dell'Oro, S, S Di Domizio, Dompè, V, Fang, D Q, Fantini, G, Faverzani, M, Ferri, E, Fiorini, E, Franceschi, M A, Freedman, S J, Fu, S H, Fujikawa, B K, Giachero, A, Gironi, L, Giuliani, A, Gorla, P, Gutierrez, T D, Han, K, Heeger, K M, Huang, R G, Huang, H Z, Johnston, J, Keppel, G, Kolomensky, Yu G, Ligi, C, L Ma, Ma, Y G, Marini, L, Maruyama, R H, Mayer, D, Mei, Y, Moggi, N, Napolitano, T, Nikkel, J, Nones, C, Norman, E B, Nucciotti, A, Nutini, I, Pagan, S, Pagliarone, C E, Pagnanini, L, Pallavicini, M, Pattavina, L, Pavan, M, Pessina, G, Pettinacci, V, Pirro, S, Pozzi, S, Puiu, A, Rusconi, C, Sangiorgio, S, Schmidt, B, Sharma, V, Singh, V, Sisti, M, Speller, D, Surukuchi, P T, Taffarello, L, Terranova, F, Tomei, C, Vetter, K J, Vignati, M, Wagaarachchi, S L, Welliver, B, Wilson, J, Wilson, K, Winslow, L A, Zimmermann, S, Zucchelli, S
• Format: Article
• Language: English
• Subjects: Bayesian analysis; Beta decay; Half-life; Neutrinos
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2012.11749

We measured two-neutrino double beta decay of \(^{130}\)Te using an exposure of 300.7 kg\(\cdot\)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: \(T^{2\nu}_{1/2} = 7.71^{+0.08}_{-0.06}\mathrm{(stat.)}^{+0.12}_{-0.15}\mathrm{(syst.)}\times10^{20}\) yr. This measurement is the most precise determination of the \(^{130}\)Te 2\(\nu\beta\beta\) decay half-life to date.