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arXiv · 2012.11749

Measurement of the 2$\nu\beta\beta$ Decay Half-life of $^{130}$Te with CUORE

CUORE Collaboration·D. Q. Adams·C. Alduino·K. Alfonso·F. T. Avignone III·O. Azzolini·G. Bari·F. Bellini·G. Benato·M. Biassoni·A. Branca·C. Brofferio·C. Bucci·J. Camilleri·A. Caminata·A. Campani·L. Canonica·X. G. Cao·S. Capelli·L. Cappelli·L. Cardani·P. Carniti·N. Casali·D. Chiesa·M. Clemenza·S. Copello·C. Cosmelli·O. Cremonesi·R. J. Creswick·A. D'Addabbo·I. Dafinei·C. J. Davis·S. Dell'Oro·S. Di Domizio·V. Dompè·D. Q. Fang·G. Fantini·M. Faverzani·E. Ferri·F. Ferroni·E. Fiorini·M. A. Franceschi·S. J. Freedman·S. H. Fu·B. K. Fujikawa·A. Giachero·L. Gironi·A. Giuliani·P. Gorla·C. Gotti·T. D. Gutierrez·K. Han·K. M. Heeger·R. G. Huang·H. Z. Huang·J. Johnston·G. Keppel·Yu. G. Kolomensky·C. Ligi·L. Ma·Y. G. Ma·L. Marini·R. H. Maruyama·D. Mayer·Y. Mei·N. Moggi·S. Morganti·T. Napolitano·M. Nastasi·J. Nikkel·C. Nones·E. B. Norman·A. Nucciotti·I. Nutini·T. O'Donnell·J. L. Ouellet·S. Pagan·C. E. Pagliarone·L. Pagnanini·M. Pallavicini·L. Pattavina·M. Pavan·G. Pessina·V. Pettinacci·C. Pira·S. Pirro·S. Pozzi·E. Previtali·A. Puiu·C. Rosenfeld·C. Rusconi·M. Sakai·S. Sangiorgio·B. Schmidt·N. D. Scielzo·V. Sharma·V. Singh·M. Sisti·D. Speller·P. T. Surukuchi
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Abstract

We measured two-neutrino double beta decay of $^{130}$Te using an exposure of 300.7 kg$\cdot$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: $T^{2\nu}_{1/2} = 7.71^{+0.08}_{-0.06}\mathrm{(stat.)}^{+0.12}_{-0.15}\mathrm{(syst.)}\times10^{20}$ yr. This measurement is the most precise determination of the $^{130}$Te 2$\nu\beta\beta$ decay half-life to date.

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CUORE Collaboration, D. Q. Adams, C. Alduino, K. Alfonso, F. T. Avignone III, O. Azzolini, G. Bari, F. Bellini, G. Benato, M. Biassoni, A. Branca, C. Brofferio, C. Bucci, J. Camilleri, A. Caminata, A. Campani, L. Canonica, X. G. Cao, S. Capelli, L. Cappelli, L. Cardani, P. Carniti, N. Casali, D. Chiesa, M. Clemenza, S. Copello, C. Cosmelli, O. Cremonesi, R. J. Creswick, A. D'Addabbo, I. Dafinei, C. J. Davis, S. Dell'Oro, S. Di Domizio, V. Dompè, D. Q. Fang, G. Fantini, M. Faverzani, E. Ferri, F. Ferroni, E. Fiorini, M. A. Franceschi, S. J. Freedman, S. H. Fu, B. K. Fujikawa, A. Giachero, L. Gironi, A. Giuliani, P. Gorla, C. Gotti, T. D. Gutierrez, K. Han, K. M. Heeger, R. G. Huang, H. Z. Huang, J. Johnston, G. Keppel, Yu. G. Kolomensky, C. Ligi, L. Ma, Y. G. Ma, L. Marini, R. H. Maruyama, D. Mayer, Y. Mei, N. Moggi, S. Morganti, T. Napolitano, M. Nastasi, J. Nikkel, C. Nones, E. B. Norman, A. Nucciotti, I. Nutini, T. O'Donnell, J. L. Ouellet, S. Pagan, C. E. Pagliarone, L. Pagnanini, M. Pallavicini, L. Pattavina, M. Pavan, G. Pessina, V. Pettinacci, C. Pira, S. Pirro, S. Pozzi, E. Previtali, A. Puiu, C. Rosenfeld, C. Rusconi, M. Sakai, S. Sangiorgio, B. Schmidt, N. D. Scielzo, V. Sharma, V. Singh, M. Sisti, D. Speller, P. T. Surukuchi. 2020-12-21. Measurement of the 2$\nu\beta\beta$ Decay Half-life of $^{130}$Te with CUORE. https://doi.org/10.1103/physrevlett.126.171801

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