학술논문
Sensitivity and Discovery Potential of CUORE to Neutrinoless Double-Beta Decay
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article
Author
Alessandria, F; Ardito, R; Artusa, DR; III, FT Avignone; Azzolini, O; Balata, M; Banks, TI; Bari, G; Beeman, J; Bellini, F; Bersani, A; Biassoni, M; Bloxham, T; Brofferio, C; Bucci, C; Cai, XZ; Canonica, L; Cao, X; Capelli, S; Carbone, L; Cardani, L; Carrettoni, M; Casali, N; Chiesa, D; Chott, N; Clemenza, M; Cosmelli, C; Cremonesi, O; Creswick, RJ; Dafinei, I; Dally, A; Datskov, V; Biasi, A De; Deninno, MM; Domizio, S Di; Vacri, ML di; Ejzak, L; Faccini, R; Fang, DQ; Farach, HA; Faverzani, M; Fernandes, G; Ferri, E; Ferroni, F; Fiorini, E; Franceschi, MA; Freedman, SJ; Fujikawa, BK; Giachero, A; Gironi, L; Giuliani, A; Goett, J; Gorla, P; Gotti, C; Guardincerri, E; Gutierrez, TD; Haller, EE; Han, K; Heeger, KM; Huang, HZ; Kadel, R; Kazkaz, K; Keppel, G; Kogler, L; Kolomensky, Yu G; Lenz, D; Li, YL; Ligi, C; Liu, X; Ma, YG; Maiano, C; Maino, M; Martinez, M; Maruyama, RH; Mei, Y; Moggi, N; Morganti, S; Napolitano, T; Newman, S; Nisi, S; Nones, C; Norman, EB; Nucciotti, A; O'Donnell, T; Orio, F; Orlandi, D; Ouellet, JL; Pallavicini, M; Palmieri, V; Pattavina, L; Pavan, M; Pedretti, M; Pessina, G; Piperno, G; Pirro, S; Previtali, E; Rampazzo, V; Rimondi, F; Rosenfeld, C; Rusconi, C
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Abstract
We present a study of the sensitivity and discovery potential of CUORE, abolometric double-beta decay experiment under construction at the LaboratoriNazionali del Gran Sasso in Italy. Two approaches to the computation ofexperimental sensitivity for various background scenarios are presented, and anextension of the sensitivity formulation to the discovery potential case isalso discussed. Assuming a background rate of 10^-2 cts/(keV kg y), we findthat, after 5 years of live time, CUORE has a 1 sigma sensitivity to theneutrinoless double-beta decay half-life of T_1/2(1 sigma) = 1.6 \times 10^26 yand thus a potential to probe the effective Majorana neutrino mass down to40-100 meV; the sensitivity at 1.64 sigma, which corresponds to 90% C.L., willbe T_1/2(1.64 sigma) = 9.5 \times 10^25 y. This range is compared with theclaim of observation of neutrinoless double-beta decay in 76Ge and thepreferred range of the neutrino mass parameter space from oscillation results.