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arXiv · 1912.10966

Improved Limit on Neutrinoless Double-Beta Decay in $^{130}$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·A. Caminata·A. Campani·L. Canonica·X. G. Cao·S. Capelli·L. Cappelli·L. Cardani·P. Carniti·N. Casali·D. Chiesa·N. Chott·M. Clemenza·S. Copello·C. Cosmelli·O. Cremonesi·R. J. Creswick·A. D'Addabbo·D. D'Aguanno·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·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·Y. G. Ma·L. Ma·L. Marini·R. H. Maruyama·Y. Mei·N. Moggi·S. Morganti·T. Napolitano·M. Nastasi·J. Nikkel·C. Nones·E. B. Norman·V. Novati·A. Nucciotti·I. Nutini·T. O'Donnell·J. L. Ouellet·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·L. Taffarello·F. Terranova
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Abstract

We report new results from the search for neutrinoless double-beta decay in $^{130}$Te with the CUORE detector. This search benefits from a four-fold increase in exposure, lower trigger thresholds and analysis improvements relative to our previous results. We observe a background of $(1.38\pm0.07)\cdot10^{-2}$ counts$/($keV$\cdot$kg$\cdot$yr$)$ in the $0\nu\beta\beta$ decay region of interest and, with a total exposure of 372.5 kg$\cdot$yr, we attain a median exclusion sensitivity of $1.7\cdot10^{25}$ yr. We find no evidence for $0\nu\beta\beta$ decay and set a $90\%$ CI Bayesian lower limit of $3.2\cdot10^{25}$ yr on the $^{130}$Te half-life for this process. In the hypothesis that $0\nu\beta\beta$ decay is mediated by light Majorana neutrinos, this results in an upper limit on the effective Majorana mass of 75-350 meV, depending on the nuclear matrix elements used.

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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, A. Caminata, A. Campani, L. Canonica, X. G. Cao, S. Capelli, L. Cappelli, L. Cardani, P. Carniti, N. Casali, D. Chiesa, N. Chott, M. Clemenza, S. Copello, C. Cosmelli, O. Cremonesi, R. J. Creswick, A. D'Addabbo, D. D'Aguanno, 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, 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, Y. G. Ma, L. Ma, L. Marini, R. H. Maruyama, Y. Mei, N. Moggi, S. Morganti, T. Napolitano, M. Nastasi, J. Nikkel, C. Nones, E. B. Norman, V. Novati, A. Nucciotti, I. Nutini, T. O'Donnell, J. L. Ouellet, 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, L. Taffarello, F. Terranova. 2019-12-23. Improved Limit on Neutrinoless Double-Beta Decay in $^{130}$Te with CUORE. https://doi.org/10.1103/physrevlett.124.122501

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