New results from the CUORE experiment

Author(s): Giachero, A; Adams, DQ; Alduino, C; Alfonso, K; III, FT Avignone; 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; Celi, E; Chiesa, D; Clemenza, M; Copello, S; Cosmelli, C; Cremonesi, O; Creswick, RJ; D'Addabbo, A; Dafinei, I; Davis, CJ; Dell'Oro, S; Domizio, S Di; Dompe, V; Fang, DQ; Fantini, G; Faverzani, M; Ferri, E; Ferroni, F; Fiorini, E; Franceschi, MA; Freedman, SJ; Fu, SH; Fujikawa, BK; 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 | Abstract: The Cryogenic Underground Observatory for Rare Events (CUORE) is the first cryogenic experiment searching for neutrinoless double-beta ($0\nu\beta\beta$) decay that has been able to reach the one-ton scale. The detector, located at the Laboratori Nazionali del Gran Sasso in Italy, consists of an array of 988 TeO$_2$ crystals arranged in a compact cylindrical structure of 19 towers. Following the completion of the detector construction in August 2016, CUORE began its first physics data run in 2017 at a base temperature of about 10 mK. Following multiple optimization campaigns in 2018, CUORE is currently in stable operating mode. In 2019, CUORE released its 2\textsuperscript{nd} result of the search for $0\nu\beta\beta$ with a TeO$_2$ exposure of 372.5 kg$\cdot$yr and a median exclusion sensitivity to a $^{130}$Te $0\nu\beta\beta$ decay half-life of $1.7\cdot 10^{25}$ yr. We find no evidence for $0\nu\beta\beta$ decay and set a 90\% C.I. (credibility interval) Bayesian lower limit of $3.2\cdot 10^{25}$ yr on the $^{130}$Te $0\nu\beta\beta$ decay half-life. In this work, we present the current status of CUORE's search for $0\nu\beta\beta$, as well as review the detector performance. Finally, we give an update of the CUORE background model and the measurement of the $^{130}$Te two neutrino double-beta ($2\nu\beta\beta$) decay half-life.