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arXiv · 1802.07791

First Result on the Neutrinoless Double Beta Decay of $^{82}$Se with CUPID-0

0 collaboration·O. Azzolini·M. T. Barrera·J. W. Beeman·F. Bellini·M. Beretta·M. Biassoni·C. Brofferio·C. Bucci·L. Canonica·S. Capelli·L. Cardani·P. Carniti·N. Casali·L. Cassina·M. Clemenza·O. Cremonesi·A. Cruciani·A. D'Addabbo·I. Dafinei·S. Di Domizio·F. Ferroni·L. Gironi·A. Giuliani·P. Gorla·C. Gotti·G. Keppel·L. Marini·M. Martinez·S. Morganti·S. Nagorny·M. Nastasi·S. Nisi·C. Nones·D. Orlandi·L. Pagnanini·M. Pallavicini·V. Palmieri·L. Pattavina·M. Pavan·G. Pessina·V. Pettinacci·S. Pirro·S. Pozzi·E. Previtali·A. Puiu·F. Reindl·C. Rusconi·K. Schaeffner·C. Tomei·M. Vignati·A. S. Zolotarova
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Abstract

We report the result of the search for neutrinoless double beta decay of $^{82}$Se obtained with CUPID-0, the first large array of scintillating Zn$^{82}$Se cryogenic calorimeters implementing particle identification. We observe no signal in a 1.83 kg yr $^{82}$Se exposure and we set the most stringent lower limit on the \onu $^{82}$Se half-life T$^{0\nu}_{1/2}>$ 2.4$\times \mathrm{10}^{24}$ yr (90\% credible interval), which corresponds to an effective Majorana neutrino mass m$_{\beta\beta} <$ (376-770) meV depending on the nuclear matrix element calculations. The heat-light readout provides a powerful tool for the rejection of \al\ particles and allows to suppress the background in the region of interest down to (3.6$^{+1.9}_{-1.4}$)$\times$10$^{-3}$\ckky, an unprecedented level for this technique.

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0 collaboration, O. Azzolini, M. T. Barrera, J. W. Beeman, F. Bellini, M. Beretta, M. Biassoni, C. Brofferio, C. Bucci, L. Canonica, S. Capelli, L. Cardani, P. Carniti, N. Casali, L. Cassina, M. Clemenza, O. Cremonesi, A. Cruciani, A. D'Addabbo, I. Dafinei, S. Di Domizio, F. Ferroni, L. Gironi, A. Giuliani, P. Gorla, C. Gotti, G. Keppel, L. Marini, M. Martinez, S. Morganti, S. Nagorny, M. Nastasi, S. Nisi, C. Nones, D. Orlandi, L. Pagnanini, M. Pallavicini, V. Palmieri, L. Pattavina, M. Pavan, G. Pessina, V. Pettinacci, S. Pirro, S. Pozzi, E. Previtali, A. Puiu, F. Reindl, C. Rusconi, K. Schaeffner, C. Tomei, M. Vignati, A. S. Zolotarova. 2018-02-21. First Result on the Neutrinoless Double Beta Decay of $^{82}$Se with CUPID-0. https://doi.org/10.1103/physrevlett.120.232502

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