Search for Double-Beta Decay of $\mathrm{^{130}Te}$ to the $0^+$ States of $\mathrm{^{130}Xe}$ with CUORE
Creators: name: CUORE Collaboration
name: Adams, D. Q.
name: Alduino, C.
name: Alfonso, K.
name: Avignone, F. T.
name: Azzolini, O.
name: Bari, G.
name: Bellini, F.
name: Benato, G.
name: Branca, M. Biassoni A.
name: Brofferio, C.
name: Bucci, C.
name: Camilleri, J.
name: Caminata, A.
name: Campani, A.
name: Canonica, L.
name: Cao, X. G.
name: Capelli, S.
name: Cappelli, L.
name: Cardani, L.
name: Casali, P. Carniti N.
name: Celi, E.
name: Copello, D. Chiesa M. Clemenza S.
name: Cosmelli, C.
name: Cremonesi, O.
name: Creswick, R. J.
name: D'Addabbo, A.
name: Dafinei, I.
name: Davis, C. J.
name: Di Domizio, S. Dell'Oro S.
name: Dompè, V.
name: Fang, D. Q.
name: Fantini, G.
name: Ferri, M. Faverzani E.
name: Ferroni, F.
name: Fiorini, E.
name: Franceschi, M. A.
name: Freedman, S. J.
name: Fu, S. H.
name: Fujikawa, B. K.
name: Giachero, A.
name: Gironi, L.
name: Giuliani, A.
name: Gorla, P.
name: Gotti, C.
name: Gutierrez, T. D.
name: Han, K.
name: Heeger, K. M.
name: Huang, R. G.
name: Huang, H. Z.
name: Johnston, J.
name: Keppel, G.
name: Kolomensky, Yu. G.
name: Ligi, C.
name: Ma, L.
name: Ma, Y. G.
name: Marini, L.
name: Maruyama, R. H.
name: Mayer, D.
name: Mei, Y.
name: Moggi, N.
name: Morganti, S.
name: Napolitano, T.
name: Nastasi, M.
name: Nikkel, J.
name: Nones, C.
name: Norman, E. B.
name: Nucciotti, A.
name: Nutini, I.
name: O'Donnell, T.
name: Ouellet, J. L.
name: Pagan, S.
name: Pagliarone, C. E.
name: Pagnanini, L.
name: Pallavicini, M.
name: Pattavina, L.
name: Pavan, M.
name: Pessina, G.
name: Pettinacci, V.
name: Pira, C.
name: Pirro, S.
name: Pozzi, S.
name: Previtali, E.
name: Puiu, A.
name: Rosenfeld, C.
name: Rusconi, C.
name: Sakai, M.
name: Sangiorgio, S.
name: Schmidt, B.
name: Scielzo, N. D.
name: Sharma, V.
name: Singh, V.
name: Sisti, M.
name: Speller, D.
name: Surukuchi, P. T.
name: Taffarello, L.
name: Terranova, F.
name: Tomei, C.
name: Vetter, K. J.
name: Vignati, M.
name: Wagaarachchi, S. L.
name: Wang, B. S.
name: Welliver, B.
name: Wilson, J.
name: Wilson, K.
name: Winslow, L. A.
name: Zimmermann, S.
name: Zucchelli, S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The CUORE experiment is a large bolometric array searching for the lepton number violating neutrino-less double beta decay ($0νββ$) in the isotope $\mathrm{^{130}Te}$. In this work we present the latest results on two searches for the double beta decay (DBD) of $\mathrm{^{130}Te}$ to the first $0^{+}_2$ excited state of $\mathrm{^{130}Xe}$: the $0νββ$ decay and the Standard Model-allowed two-neutrinos double beta decay ($2νββ$). Both searches are based on a 372.5 kg$\times$yr TeO$_2$ exposure. The de-excitation gamma rays emitted by the excited Xe nucleus in the final state yield a unique signature, which can be searched for with low background by studying coincident events in two or more bolometers. The closely packed arrangement of the CUORE crystals constitutes a significant advantage in this regard. The median limit setting sensitivities at 90\% Credible Interval (C.I.) of the given searches were estimated as $\mathrm{S^{0ν}_{1/2} = 5.6 \times 10^{24} \: \mathrm{yr}}$ for the ${0νββ}$ decay and $\mathrm{S^{2ν}_{1/2} = 2.1 \times 10^{24} \: \mathrm{yr}}$ for the ${2νββ}$ decay. No significant evidence for either of the decay modes was observed and a Bayesian lower bound at $90\%$ C.I. on the decay half lives is obtained as: $\mathrm{(T_{1/2})^{0ν}_{0^+_2} &gt; 5.9 \times 10^{24} \: \mathrm{yr}}$ for the $0νββ$ mode and $\mathrm{(T_{1/2})^{2ν}_{0^+_2} &gt; 1.3 \times 10^{24} \: \mathrm{yr}}$ for the $2νββ$ mode. These represent the most stringent limits on the DBD of $^{130}$Te to excited states and improve by a factor $\sim5$ the previous results on this process.
description: 13 pages, 6 figures