The CUORE experiment, a ton-scale cryogenic bolometer array, recently began operation at the Laboratori Nazionali del Gran Sasso in Italy. The array represents a significant advancement in this technology, and in this work we apply it for the first time to a high-sensitivity search for a lepton-numberviolating process: 130Te neutrinoless double-beta decay. Examining a total TeO2 exposure of 86.3 kg yr, characterized by an effective energy resolution of d7.7 ± 0.5T keV FWHM and a background in the region of interest of d0.014 ± 0.002T counts=dkeV kg yrT, we find no evidence for neutrinoless double-beta decay. Including systematic uncertainties, we place a lower limit on the decay half-life of T0ν1/2 (130Te) > 1.3 × 1025 yr (90% C.L.); the median statistical sensitivity of this search is 7.0 × 1024 yr. Combining this result with those of two earlier experiments, Cuoricino and CUORE-0, we find T0ν1/2 (130Te) > 1.5 × 1025 yr (90% C.L.), which is the most stringent limit to date on this decay. Interpreting this result as a limit on the effective Majorana neutrino mass, we find mββ < (110 - 520) meV, where the range reflects the nuclear matrix element estimates employed.

Alduino, C., Alessandria, F., Alfonso, K., Andreotti, E., Arnaboldi, C., Avignone, F., et al. (2018). First results from CUORE: A search for lepton number violation via 0νββ decay of 130Te. PHYSICAL REVIEW LETTERS, 120(13) [10.1103/PhysRevLett.120.132501].

First results from CUORE: A search for lepton number violation via 0νββ decay of 130Te

Arnaboldi, C.;Biassoni, M.;Branca, A.;Brofferio, C.;Canonica, L.;Capelli, S.;Carniti, P.;Cassina, L.;Chiesa, D.;Clemenza, M.;Cremonesi, O.
;
Dell’Oro, S.;Faverzani, M.;Ferri, E.;Fiorini, E.;Giachero, A.;Gironi, L.;Gorla, P.;Gotti, C.;Nastasi, M.;Nones, C.;Nucciotti, A.;Nutini, I.;Pattavina, L.;Pavan, M.;Pessina, G.;Pozzi, S.;Previtali, E.;SCHAEFFER, DAVID;Sisti, M.;Terranova, F.;Zanotti, L.;
2018

Abstract

The CUORE experiment, a ton-scale cryogenic bolometer array, recently began operation at the Laboratori Nazionali del Gran Sasso in Italy. The array represents a significant advancement in this technology, and in this work we apply it for the first time to a high-sensitivity search for a lepton-numberviolating process: 130Te neutrinoless double-beta decay. Examining a total TeO2 exposure of 86.3 kg yr, characterized by an effective energy resolution of d7.7 ± 0.5T keV FWHM and a background in the region of interest of d0.014 ± 0.002T counts=dkeV kg yrT, we find no evidence for neutrinoless double-beta decay. Including systematic uncertainties, we place a lower limit on the decay half-life of T0ν1/2 (130Te) > 1.3 × 1025 yr (90% C.L.); the median statistical sensitivity of this search is 7.0 × 1024 yr. Combining this result with those of two earlier experiments, Cuoricino and CUORE-0, we find T0ν1/2 (130Te) > 1.5 × 1025 yr (90% C.L.), which is the most stringent limit to date on this decay. Interpreting this result as a limit on the effective Majorana neutrino mass, we find mββ < (110 - 520) meV, where the range reflects the nuclear matrix element estimates employed.
Articolo in rivista - Review Essay
Neutrinoless double beta decay
English
2018
120
13
132501
reserved
Alduino, C., Alessandria, F., Alfonso, K., Andreotti, E., Arnaboldi, C., Avignone, F., et al. (2018). First results from CUORE: A search for lepton number violation via 0νββ decay of 130Te. PHYSICAL REVIEW LETTERS, 120(13) [10.1103/PhysRevLett.120.132501].
File in questo prodotto:
File Dimensione Formato  
2_PhysRevLett.120.132501.pdf

Solo gestori archivio

Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Dimensione 410.9 kB
Formato Adobe PDF
410.9 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/193250
Citazioni
  • Scopus 266
  • ???jsp.display-item.citation.isi??? 243
Social impact