We measured two-neutrino double beta decay of Te130 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: T1/22ν=7.71-0.06+0.08(stat)-0.15+0.12(syst)×1020 yr. This measurement is the most precise determination of the Te130 2νββ decay half-life to date.
Adams, D., Alduino, C., Alfonso, K., Avignone, F., Azzolini, O., Bari, G., et al. (2021). Measurement of the 2νββ Decay Half-Life of Te 130 with CUORE. PHYSICAL REVIEW LETTERS, 126(17) [10.1103/PhysRevLett.126.171801].
Measurement of the 2νββ Decay Half-Life of Te 130 with CUORE
Biassoni M.;Branca A.;Brofferio C.;Canonica L.;Capelli S.;Carniti P.;Chiesa D.;Clemenza M.;Cremonesi O.;Dell'oro S.;Faverzani M.;Ferri E.;Giachero A.;Gironi L.;Gotti C.;Nastasi M.;Nones C.;Nucciotti A.;Nutini I.;Pagnanini L.;Pattavina L.;Pavan M.;Pessina G.;Pozzi S.;Previtali E.;Puiu A.;Sisti M.;Terranova F.;
2021
Abstract
We measured two-neutrino double beta decay of Te130 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: T1/22ν=7.71-0.06+0.08(stat)-0.15+0.12(syst)×1020 yr. This measurement is the most precise determination of the Te130 2νββ decay half-life to date.
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