Sensitivity and Discovery Potential of CUORE to Neutrinoless Double-Beta Decay

We present a study of the sensitivity and discovery potential of CUORE, a bolometric double-beta decay experiment under construction at the Laboratori Nazionali del Gran Sasso in Italy. Two approaches to the computation of experimental sensitivity for various background scenarios are presented, and an extension of the sensitivity formulation to the discovery potential case is also discussed. Assuming a background rate of 10 − 2 cts/(keV kg y), we find that, after 5 years of live time, CUORE will have a 1 σ sensitivity to the neutrinoless double-beta decay half-life of and thus a potential to probe the effective Majorana neutrino mass down to 40–100 meV; the sensitivity at 1.64 σ , which corresponds to 90% C.L., will be d T 0 ν 1 / 2 (1 . 64 σ ) = 9 . 5 × 10 25 y. This range is compared with the claim of observation of neutrinoless double-beta decay in 76 Ge and the preferred range in the neutrino mass parameter space from oscillation results.

D. R. Artusa | M. Deninno | N. Moggi | F. Rimondi | J. Beeman | E. Haller | R. Creswick | H. Farach | R. Maruyama | A. Woodcraft | F. Alessandria | X. Liu | I. Dafinei | L. Carbone | D. Lenz | M. Pallavicini | C. Rosenfeld | M. Clemenza | E. Guardincerri | M. Maino | A. Smith | T. Banks | F. Ferroni | S. Morganti | S. Freedman | S. Domizio | C. Gotti | E. Norman | K. Heeger | G. Bari | Andrea Giachero | S. Zucchelli | Y. Ma | E. Fiorini | K. Kazkaz | F. Avignone | J. Goett | S. Trentalange | T. Wise | B. Fujikawa | R. Kadel | M. Balata | S. Nisi | G. Pessina | Y. Kolomensky | R. Faccini | F. Bellini | K. Han | A. Bersani | S. Capelli | O. Azzolini | F. Stivanello | T. O'donnell | D. Chiesa | M. Sisti | M. Martinez | M. Franceschi | G. Ventura | V. Datskov | R. Ardito | V. Palmieri | M. Biassoni | T. Bloxham | C. Cosmelli | E. Previtali | T. Napolitano | L. Cardani | N. Casali | C. Tomei | M. Vignati | C. Bucci | A. Nucciotti | C. Brofferio | M. Faverzani | E. Ferri | O. Cremonesi | X. Cai | T. Gutierrez | A. Giuliani | M. Pavan | S. Pirrò | S. Sangiorgio | D. Fang | L. Canonica | P. Gorla | C. Nones | L. Zanotti | M. Pedretti | N. Scielzo | C. Maiano | M. Carrettoni | L. Ejzak | L. Gironi | L. Kogler | S. Newman | F. Orio | L. Pattavina | C. Rusconi | L. Taffarello | Y. Mei | G. Keppel | B. Wang | X. Cao | C. Ligi | N. Chott | D. Orlandi | J. Ouellet | G. Piperno | M. Vacri | G. Fernandes | M. Tenconi | B. Zhu | E. Sala | C. Zarra | A. Biasi | A. Dally | Y. Li | W. Tian | H. Huang | V. Rampazzo | H. Wang | T. O’Donnell | A. Smith

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