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

Abstract

We report on a search for double beta decay of ${}^{130}$Te to the first $0^{+}$ excited state of ${}^{130}$Xe using a 9.8 kg$\cdot$yr exposure of ${}^{130}$Te 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-decay modes. We find no evidence for either mode and place lower bounds on the half-lives: ${\tau }_{0^{+}}^{0\nu }>7.9\cdot 10^{23}$ yr and ${\tau }_{0^{+}}^{2\nu }>2.4\cdot 10^{23}$ yr. Combining our results with those obtained by the CUORICINO experiment, we achieve the most stringent constraints available for these processes: ${\tau }_{0^{+}}^{0\nu }>1.4\cdot 10^{24}$ yr and ${\tau }_{0^{+}}^{2\nu }>2.5\cdot 10^{23}$ yr.

arXiv comment9 pages, 5 figures, 5 tables

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• Search for Two-neutrino Double-Beta Decay of ${}^{136}\mathrm{Xe}$ to the $0_1^{+}$ excited state of ${}^{136}\mathrm{Ba}$ with the Complete EXO-200 Dataset
• Double Beta Decay Experiments at Canfranc Underground Laboratory
• Double-beta decay of ${}^{150}$Nd to excited levels of ${}^{150}$Sm
• Search for Double-Beta Decay of ${}^{130}\mathrm{Te}$ to the $0^{+}$ States of ${}^{130}\mathrm{Xe}$ with CUORE