Search for Neutrinoless Double-Beta Decay of [superscript 130]Te with CUORE-0
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PhysRevLett.115.102502.pdf
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Author(s)
Alfonso, K.
Artusa, D. R.
Avignone, F. T.
Azzolini, O.
Balata, M.
Banks, T. I.
Bari, G.
Beeman, J. W.
Bellini, F.
Bersani, A.
Date Issued
September 2015
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Alfonso, K., D. R. Artusa, F. T. Avignone, O. Azzolini, M. Balata, T. I. Banks, G. Bari, et al. “Search for Neutrinoless Double-Beta Decay of Te 130 with CUORE-0.” Physical Review Letters 115, no. 10 (September 3, 2015). © 2015 American Physical Society
Version
Final published version
Abstract
We report the results of a search for neutrinoless double-beta decay in a 9.8 kg yr exposure of [superscript 130]Te 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 ± 0.004(stat) ± 0.002(syst) counts/(keV kg yr), respectively. The median 90% C.L. lower-limit half-life sensitivity of the experiment is 2.9×10[superscript 24] yr and surpasses the sensitivity of previous searches. We find no evidence for neutrinoless double-beta decay of [superscript 130]Te and place a Bayesian lower bound on the decay half-life, T[0ν over 1/2] > 2.7 × 10[superscript 24] yr at 90% C.L. Combining CUORE-0 data with the 19.75 kg yr exposure of [superscript 130]Te from the Cuoricino experiment we obtain T[0ν over 1/2] > 4.0×10[superscript 24] yr at 90% C.L. (Bayesian), the most stringent limit 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, m[subscript ββ] < 270–760 meV.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.115.102502
