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Search for Neutrinoless Double-Beta Decay of Te 130 with CUORE-0

  • Author(s): Alfonso, K
  • Artusa, DR
  • Avignone, FT
  • Azzolini, O
  • Balata, M
  • Banks, TI
  • Bari, G
  • Beeman, JW
  • Bellini, F
  • Bersani, A
  • Biassoni, M
  • Brofferio, C
  • Bucci, C
  • Caminata, A
  • Canonica, L
  • Cao, XG
  • Capelli, S
  • Cappelli, L
  • Carbone, L
  • Cardani, L
  • Casali, N
  • Cassina, L
  • Chiesa, D
  • Chott, N
  • Clemenza, M
  • Copello, S
  • Cosmelli, C
  • Cremonesi, O
  • Creswick, RJ
  • Cushman, JS
  • Dafinei, I
  • Dally, A
  • Dell'Oro, S
  • Deninno, MM
  • Di Domizio, S
  • Di Vacri, ML
  • Drobizhev, A
  • Ejzak, L
  • Fang, DQ
  • Faverzani, M
  • Fernandes, G
  • Ferri, E
  • Ferroni, F
  • Fiorini, E
  • Freedman, SJ
  • Fujikawa, BK
  • Giachero, A
  • Gironi, L
  • Giuliani, A
  • Gorla, P
  • Gotti, C
  • Gutierrez, TD
  • Haller, EE
  • Han, K
  • Hansen, E
  • Heeger, KM
  • Hennings-Yeomans, R
  • Hickerson, KP
  • Huang, HZ
  • Kadel, R
  • Keppel, G
  • Kolomensky, YG
  • Lim, KE
  • Liu, X
  • Ma, YG
  • Maino, M
  • et al.
Abstract

© 2015 American Physical Society. © 2015 American Physical Society. We report the results of a search for neutrinoless double-beta decay in a 9.8 kg yr exposure of Te130 using a bolometric detector array, CUORE-0. The characteristic detector energy resolution and background level in the region of interest are 5.1±0.3keV FWHM and 0.058±0.004(stat)±0.002(syst)counts/(keVkgyr), respectively. The median 90% C.L. lower-limit half-life sensitivity of the experiment is 2.9×1024yr and surpasses the sensitivity of previous searches. We find no evidence for neutrinoless double-beta decay of Te130 and place a Bayesian lower bound on the decay half-life, T1/20ν>2.7×1024yr at 90% C.L. Combining CUORE-0 data with the 19.75 kg yr exposure of Te130 from the Cuoricino experiment we obtain T1/20ν>4.0×1024yr at 90% C.L. (Bayesian), the most stringent limit to date on this half-life. Using a range of nuclear matrix element estimates we interpret this as a limit on the effective Majorana neutrino mass, mββ<270-760meV.

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