Search for Neutrinoless Double-Beta Decay of Te 130 with CUORE-0

Alfonso, K.; Artusa, D. R.; Avignone, F. T.; Azzolini, O.; Balata, M.; Banks, T. I.; Bari, G.; Beeman, J. W.; Bellini, Fabio; Bersani, A.; Biassoni, M.; Brofferio, C.; Bucci, C.; Caminata, A.; Canonica, L.; Cao, X. G.; Capelli, S.; Cappelli, L.; Carbone, L.; Cardani, Laura; Casali, Nicola; Cassina, L.; Chiesa, D.; Chott, N.; Clemenza, M.; Copello, S.; Cosmelli, Carlo; Cremonesi, O.; Creswick, R. J.; Cushman, J. S.; Dafinei, Ioan; Dally, A.; Dell'Oro, S.; Deninno, M. M.; Di Domizio, S.; Di Vacri, M. L.; Drobizhev, A.; Ejzak, L.; Fang, D. Q.; Faverzani, M.; Fernandes, G.; Ferri, E.; Ferroni, Fernando; Fiorini, E.; Freedman, S. J.; Fujikawa, B. K.; Giachero, A.; Gironi, L.; Giuliani, A.; Gorla, P.; Gotti, C.; Gutierrez, T. D.; Haller, E. E.; Han, K.; Hansen, E.; Heeger, K. M.; Hennings Yeomans, R.; Hickerson, K. P.; Huang, H. Z.; Kadel, R.; Keppel, G.; Kolomensky, Y. U. G.; Lim, K. E.; Liu, X.; Y. G., Ma; Maino, M.; Martinez Perez, Maria Lucia; Maruyama, R. H.; Mei, Y.; Moggi, N.; Morganti, S.; Nisi, S.; Nones, C.; Norman, E. B.; Nucciotti, A.; O'Donnell, T.; Orio, Filippo; Orlandi, D.; Ouellet, J. L.; Pagliarone, C. E.; Pallavicini, M.; Palmieri, V.; Pattavina, L.; Pavan, M.; Pedretti, M.; Pessina, G.; Pettinacci, V.; Piperno, Gabriele; Pirro, S.; Pozzi, S.; Previtali, E.; Rosenfeld, C.; Rusconi, C.; Sala, E.; Sangiorgio, S.; Santone, D.; Scielzo, N. D.; Sisti, M.; Smith, A. R.; Taffarello, L.; Tenconi, M.; Terranova, F.; Tomei, C.; Trentalange, S.; Ventura, G.; Vignati, Marco; Wagaarachchi, S. L.; Wang, B. S.; Wang, H. W.; Wielgus, L.; Wilson, J.; Winslow, L. A.; Wise, T.; Zanotti, L.; Zarra, C.; Zhang, G. Q.; Zhu, B. X.; Zucchelli, S.

doi:10.1103/PhysRevLett.115.102502

We report the results of a search for neutrinoless double-beta decay in a 9.8 kg yr exposure of 130Te using a bolometric detector array, CUORE-0. The characteristic detector energy resolution and background level in the region of interest are 5.1 0.3 keV FWHM and 0.058 0.004ðstatÞ 0.002ðsystÞcounts=ðkeV kg yrÞ, respectively. The median 90% C.L. lower-limit half-life sensitivity of the experiment is 2.9 × 1024 yr and surpasses the sensitivity of previous searches. We find no evidence for neutrinoless double-beta decay of 130Te and place a Bayesian lower bound on the decay half-life, T0ν > 2.7 × 1024 yr at 90% C.L. Combining CUORE-0 data with the 19.75 kg yr exposure of 130Te from 1=2 the Cuoricino experiment we obtain T0ν > 4.0 × 1024 yr at 90% C.L. (Bayesian), the most stringent limit 1=2 to date on this half-life. Using a range of nuclear matrix element estimates we interpret this as a limit on the effective Majorana neutrino mass, mββ < 270–760 meV.

Search for Neutrinoless Double-Beta Decay of Te 130 with CUORE-0 / Alfonso, K., Artusa, D.R., Avignone, F.T., Azzolini, O., Balata, M., Banks, T.I., Bari, G., Beeman, J.W., Bellini, F., Bersani, A., Biassoni, M., Brofferio, C., Bucci, C., Caminata, A., Canonica, L., Cao, X.G., Capelli, S., Cappelli, L., Carbone, L., Cardani, L., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 115:10(2015), p. 102502. [10.1103/PhysRevLett.115.102502]