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Improved Limit on Neutrinoless Double-Beta Decay in ^{130} Te with CUORE.

  • Author(s): Adams, DQ
  • Alduino, C
  • Alfonso, K
  • Avignone, FT
  • Azzolini, O
  • Bari, G
  • Bellini, F
  • Benato, G
  • Biassoni, M
  • Branca, A
  • Brofferio, C
  • Bucci, C
  • Caminata, A
  • Campani, A
  • Canonica, L
  • Cao, XG
  • Capelli, S
  • Cappelli, L
  • Cardani, L
  • Carniti, P
  • Casali, N
  • Chiesa, D
  • Chott, N
  • Clemenza, M
  • Copello, S
  • Cosmelli, C
  • Cremonesi, O
  • Creswick, RJ
  • D'Addabbo, A
  • D'Aguanno, D
  • Dafinei, I
  • Davis, CJ
  • Dell'Oro, S
  • Di Domizio, S
  • Dompè, V
  • Fang, DQ
  • Fantini, G
  • Faverzani, M
  • Ferri, E
  • Ferroni, F
  • Fiorini, E
  • Franceschi, MA
  • Freedman, SJ
  • Fujikawa, BK
  • Giachero, A
  • Gironi, L
  • Giuliani, A
  • Gorla, P
  • Gotti, C
  • Gutierrez, TD
  • Han, K
  • Heeger, KM
  • Huang, RG
  • Huang, HZ
  • Johnston, J
  • Keppel, G
  • Kolomensky, Yu G
  • Ligi, C
  • Ma, YG
  • Ma, L
  • Marini, L
  • Maruyama, RH
  • Mei, Y
  • Moggi, N
  • Morganti, S
  • Napolitano, T
  • Nastasi, M
  • Nikkel, J
  • Nones, C
  • Norman, EB
  • Novati, V
  • Nucciotti, A
  • Nutini, I
  • O'Donnell, T
  • Ouellet, JL
  • Pagliarone, CE
  • Pagnanini, L
  • Pallavicini, M
  • Pattavina, L
  • Pavan, M
  • Pessina, G
  • Pettinacci, V
  • Pira, C
  • Pirro, S
  • Pozzi, S
  • Previtali, E
  • Puiu, A
  • Rosenfeld, C
  • Rusconi, C
  • Sakai, M
  • Sangiorgio, S
  • Schmidt, B
  • Scielzo, ND
  • Sharma, V
  • Singh, V
  • Sisti, M
  • Speller, D
  • Surukuchi, PT
  • Taffarello, L
  • Terranova, F
  • Tomei, C
  • Vignati, M
  • Wagaarachchi, SL
  • Wang, BS
  • Welliver, B
  • Wilson, J
  • Wilson, K
  • Winslow, LA
  • Zanotti, L
  • Zimmermann, S
  • Zucchelli, S
  • CUORE Collaboration
  • et al.
Abstract

We report new results from the search for neutrinoless double-beta decay in ^{130} Te with the CUORE detector. This search benefits from a fourfold increase in exposure, lower trigger thresholds, and analysis improvements relative to our previous results. We observe a background of (1.38±0.07)×10^{-2}  counts/(keV kg yr)) in the 0νββ decay region of interest and, with a total exposure of 372.5 kg yr, we attain a median exclusion sensitivity of 1.7×10^{25}  yr. We find no evidence for 0νββ decay and set a 90% credibility interval Bayesian lower limit of 3.2×10^{25}  yr on the ^{130} Te half-life for this process. In the hypothesis that 0νββ decay is mediated by light Majorana neutrinos, this results in an upper limit on the effective Majorana mass of 75-350 meV, depending on the nuclear matrix elements used.

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