Search for Neutrinoless $\beta^{+}\hspace{-0.2em}EC$ Decay of $^{120}$Te with CUORE-0

• Main Authors: CUORE Collaboration, Alduino, C, Alfonso, K, Artusa, D. R, AvignoneIII, F. T, Azzolini, O, Bari, G, Bellini, F, Benato, G, Bersani, A, Branca, A, Brofferio, C, Bucci, C, Camacho, A, Caminata, A, Canonica, L, Cao, X. G, Capelli, S, Cappelli, L, Cardani, L, Carniti, P, Casali, N, Cassina, L, Chott, N, Clemenza, M, Copello, S, Cosmelli, C, Cremonesi, O, Creswick, R. J, D'Addabbo, A, D'Aguanno, D, Dafinei, I, Davis, C. J, Dell'Oro, S, Deninno, M. M, Di Domizio, S, Di Vacri, M. L, Drobizhev, A, Fang, D. Q, Faverzani, M, Ferri, E, Ferroni, F, Fiorini, E, Franceschi, M. A, Freedman, S. J, Fujikawa, B. K, Giachero, A, Gironi, L, Giuliani, A, Gorla, P, Gotti, C, Gutierrez, T. D, Heeger, K. M, Hennings-Yeomans, R, Huang, H. Z, Keppel, G, Kolomensky, Yu. G, Leder, A, Ligi, C, Lim, K. E, Marini, L, Maruyama, R. H, Mei, Y, Moggi, N, Morganti, S, Nagorny, S. S, Nastasi, M, Nones, C, Norman, E. B, Novati, V, Nucciotti, A, Ouellet, J. L, Pallavicini, M, Palmieri, V, Pattavina, L, Pavan, M, Pessina, G, Pira, C, Pozzi, S, Previtali, E, Rosenfeld, C, Rusconi, C, Sakai, M, Sangiorgio, S, Schmidt, B, Scielzo, N. D, Singh, V, Sisti, M, Taffarello, L, Terranova, F, Tomei, C, Wang, B. S, Wilson, J, Winslow, L. A, Wise, T, Woodcraft, A, Zanotti, L, Zhang, G. Q, Zimmermann, S, Zucchelli, S
• Format: Journal Article
• Language: English
• Published: 20.10.2017
• Subjects: Physics - Nuclear Experiment
• DOI: 10.48550/arxiv.1710.07459

Phys. Rev. C 97, 055502 (2018) We have performed a search for neutrinoless $\beta^{+}\hspace{-0.2em}EC$ decay of $^{120}$Te using the final CUORE-0 data release. We describe a new analysis method for the simultaneous fit of signatures with different event topology, and of data subsets with different signal efficiency, obtaining a limit on the half-life of the decay of $T_{1/2}>1.6\cdot10^{21}$ yr at $90\%$ CI. Combining this with results from Cuoricino, a predecessor experiment, we obtain the strongest limit to date, corresponding to $T_{1/2}>2.7\cdot10^{21}$ yr at $90\%$ CI.