Abstract
We measured two-neutrino double beta decay of ^{130}Te using an exposure of 300.7kg yr accumulated with the CUORE detector. Using a Bayesian analysis to fit simulated spectra to experimental data, it was possible to disentangle all the major background sources and precisely measure the two-neutrino contribution. The half-life is in agreement with past measurements with a strongly reduced uncertainty: T_{1/2}^{2ν}=7.71_{-0.06}^{+0.08}(stat)_{-0.15}^{+0.12}(syst)×10^{20} yr. This measurement is the most precise determination of the ^{130}Te 2νββ decay half-life to date.
Highlights
We measured two-neutrino double beta decay of 130Te using an exposure of 300.7 kg yr accumulated with the CUORE detector
Thereafter, we provide a description of the technique used to fit the experimental data, and we present a discussion of the fit results
The CUORE detector consists of 988 TeO2 crystals [30] arranged in 19 towers made of 13 floors of 4 crystals, read out as individual channels
Summary
We measured two-neutrino double beta decay of 130Te using an exposure of 300.7 kg yr accumulated with the CUORE detector. Using a Bayesian analysis to fit simulated spectra to experimental data, it was possible to disentangle all the major background sources and precisely measure the two-neutrino contribution. The half-life is in agreement with past measurements with a strongly reduced uncertainty: T
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