Sensitivity of the CUPID experiment to $0\nu\beta\beta$ decay of $^{100}$Mo

/ Authors

K. Alfonso, A. Armatol, C. Augier, F. Avignone, O. Azzolini, A. Barabash, G. Bari, A. Barresi, D. Baudin, F. Bellini

and 181 more authors

G. Benato, L. Benussi, V. Berest, M. Beretta, L. Berg´e, M. Bettelli, M. Biassoni, J. Billard, F. Boffelli, V. Boldrini, E. Brandani, C. Brofferio, C. Bucci, M. Buchynska, J. Camilleri, A. Campani, J. Cao, C. Capelli, S. Capelli, V. Caracciolo, L. Cardani, P. Carniti, N. Casali, E. Celi, C. Chang, M. Chapellier, H. Chen, D. Chiesa, D. Cintas, M. Clemenza, I. Colantoni, S. Copello, O. Cremonesi, R. Creswick, A. D’Addabbo, I. Dafinei, F. Danevich, F. Dominicis, M. D. Jesús, P. Marcillac, S. Dell’Oro, S. Domizio, S. Lorenzo, T. Dixon, A. Drobizhev, L. Dumoulin, M. E. Idrissi, M. Faverzani, E. Ferri, F. Ferri, F. Ferroni, E. Figueroa-Feliciano, J. Formaggio, A. Franceschi, S. Fu, B. Fujikawa, J. Gascon, S. Ghislandi, A. Giachero, M. Girola, L. Gironi, A. Giuliani, P. Gorla, C. Gotti, C. Grant, P. Gras, P. Guillaumon, T. D. Gutierrez, K. Han, E. Hansen, K. Heeger, D. Helis, H. Huang, M. T. Hurst, L. Imbert, A. Juillard, G. Karapetrov, G. Keppel, H. Khalife, V. Kobychev, Y. Kolomensky, R. Kowalski, H. Lattaud, M. Lefevre, M. Lisovenko, R. Liu, Y. Liu, P. Loaiza, L. Ma, F. Mancarella, N. Manenti, A. Mariani, L. Marini, S. Marnieros, M. Martinez, R. Maruyama, P. Mas, D. Mayer, G. Mazzitelli, E. Mazzola, Y. Mei, M. Moore, S. Morganti, T. Napolitano, M. Nastasi, J. Nikkel, C. Nones, E. B. Norman, V. Novosad, I. Nutini, T. O’Donnell, E. Olivieri, M. Olmi, B. T. Oregui, S. Pagan, M. Pageot, L. Pagnanini, D. Pasciuto, L. Pattavina, M. Pavan, ¨O. Penek, H. Peng, G. Pessina, V. Pettinacci, C. Pira, S. Pirrò, O. Pochon, D. Poda, T. Polakovič, O. Polischuk, E. Pottebaum, S. Pozzi, E. Previtali, A. Puiu, S. Puranam, S. Quitadamo, A. Rappoldi, G. Raselli, A. Ressa, R. Rizzoli, C. Rosenfeld, P. Rosier, M. Rossella, J. Scarpaci, B. Schmidt, R. Serino, A. Shaikina, K. Shang, V. Sharma, V. Shlegel, V. Singh, M. Sisti, P. Slocum, D. Speller, P. T. Surukuchi, L. Taffarello, S. Tomassini, C. Tomei, A. Torres, J. Torres, D. Tozzi, V. Tretyak, D. Trotta, M. Velázquez, K. Vetter, S. Wagaarachchi, G. Wang, L. Wang, R. Wang, J. Wilson, K. Wilson, L. A. Winslow, F. Xie, M. Xue, J. Yang, V. Yefremenko, V. Umatov, M. Zarytskyy, T. Zhu, A. Zolotarova, S. Zucchelli

/ Abstract

CUPID is a next-generation bolometric experiment to search for neutrinoless double-beta decay ($0\nu\beta\beta$) of $^{100}$Mo using Li$_2$MoO$_4$ scintillating crystals. It will operate 1596 crystals at $\sim$10 mK in the CUORE cryostat at the Laboratori Nazionali del Gran Sasso in Italy. Each crystal will be facing two Ge-based bolometric light detectors for $\alpha$ rejection. We compute the discovery and the exclusion sensitivity of CUPID to $0\nu\beta\beta$ in a Frequentist and a Bayesian framework. This computation is done numerically based on pseudo-experiments. For the CUPID baseline scenario, with a background and an energy resolution of $1.0 \times 10^{-4}$ counts/keV/kg/yr and 5 keV FWHM at the Q-value, respectively, this results in a Bayesian exclusion sensitivity (90% c.i.) of $\hat{T}_{1/2}>1.6 \times 10^{27} \ \mathrm{yr}$, corresponding to the effective Majorana neutrino mass of $\hat{m}_{\beta\beta}<\ 9.6$ -- $28 \ \mathrm{meV}$. The Frequentist discovery sensitivity (3$\sigma$) is $\hat{T}_{1/2}= 1.0 \times 10^{27} \ \mathrm{yr}$, corresponding to $\hat{m}_{\beta\beta}= \ 12$ -- $36 \ \mathrm{meV}$.