Double-beta decay of $$^{130}\hbox {Te}$$130Te to the first $$0^+$$0+ excited state of $$^{130}\hbox {Xe}$$130Xe with CUORE-0

• Main Authors: Alduino, C. (Author), Alfonso, K. (Author), Artusa, D. R (Author), Avignone III, F. T (Author), Azzolini, O. (Author), Banks, T. I (Author), Bari, G. (Author), Beeman, J. W (Author), Bellini, F. (Author), Bersani, A. (Author), Biassoni, M. (Author), Brofferio, C. (Author), Bucci, C. (Author), Camacho, A. (Author), Caminata, A. (Author), Canonica, L. (Author), Cao, X. G (Author), Capelli, S. (Author), Cappelli, L. (Author), Carbone, L. (Author)
• Format: Article
• Language: English
• Published: Springer Berlin Heidelberg, 2021-09-20T17:29:10Z.
• Subjects: Article
• Online Access: Get fulltext

 Abstract We report on a search for double beta decay of $$^{130}\hbox {Te}$$130Te to the first $$0^{+}$$0+ excited state of $$^{130}\hbox {Xe}$$130Xe using a $$9.8\,\hbox {kg}\cdot \hbox {yr}$$9.8kg·yr exposure of $$^{130}\hbox {Te}$$130Te collected with the CUORE-0 experiment. In this work we exploit different topologies of coincident events to search for both the neutrinoless and two-neutrino double beta decay modes. We find no evidence for either mode and place lower bounds on the half-lives: $$T^{0\nu }_{0^+_1}>7.9\cdot 10^{23}\hbox {yr}$$T01+0ν>7.9·1023yr and $$T^{2\nu }_{0^+_1}>2.4\cdot 10^{23}\hbox {yr}$$T01+2ν>2.4·1023yr ($$90\%\,\hbox {CL}$$90%CL). Combining our results with those obtained by the CUORICINO experiment, we achieve the most stringent constraints available for these processes: $$T^{0\nu }_{0^+_1}>1.4\cdot 10^{24}\hbox {yr}$$T01+0ν>1.4·1024yr and $$T^{2\nu }_{0^+_1}>2.5\cdot 10^{23}\hbox {yr}$$T01+2ν>2.5·1023yr ($$90\%\,\hbox {CL}$$90%CL).