We report new results from the search for neutrinoless double-beta decay in Te130 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 1.7×1025 yr. We find no evidence for 0νββ decay and set a 90% credibility interval Bayesian lower limit of 3.2×1025 yr on the Te130 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.
Improved Limit on Neutrinoless Double-Beta Decay in Te 130 with CUORE / Adams D.Q.; Alduino C.; Alfonso K.; Avignone F.T.; Azzolini O.; Bari G.; Bellini F.; Benato G.; Biassoni M.; Branca A.; Brofferio C.; Bucci C.; Caminata A.; Campani A.; Canonica L.; Cao X.G.; Capelli S.; Cappelli L.; Cardani L.; Carniti P.; Casali N.; Chiesa D.; Chott N.; Clemenza M.; Copello S.; Cosmelli C.; Cremonesi O.; Creswick R.J.; D'Addabbo A.; D'Aguanno D.; Dafinei I.; Davis C.J.; Dell'Oro S.; Di Domizio S.; Dompe V.; Fang D.Q.; Fantini G.; Faverzani M.; Ferri E.; Ferroni F.; Fiorini E.; Franceschi M.A.; Freedman S.J.; Fujikawa B.K.; Giachero A.; Gironi L.; Giuliani A.; Gorla P.; Gotti C.; Gutierrez T.D.; Han K.; Heeger K.M.; Huang R.G.; Huang H.Z.; Johnston J.; Keppel G.; Kolomensky Y.G.; Ligi C.; Ma Y.G.; Ma L.; Marini L.; Maruyama R.H.; Mei Y.; Moggi N.; Morganti S.; Napolitano T.; Nastasi M.; Nikkel J.; Nones C.; Norman E.B.; Novati V.; Nucciotti A.; Nutini I.; O'Donnell T.; Ouellet J.L.; Pagliarone C.E.; 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 N.D.; Sharma V.; Singh V.; Sisti M.; Speller D.; Surukuchi P.T.; Taffarello L.; Terranova F.; Tomei C.; Vignati M.; Wagaarachchi S.L.; Wang B.S.; Welliver B.; Wilson J.; Wilson K.; Winslow L.A.; Zanotti L.; Zimmermann S.; Zucchelli S.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 124:12(2020), pp. 122501.1-122501.8. [10.1103/PhysRevLett.124.122501]
Improved Limit on Neutrinoless Double-Beta Decay in Te 130 with CUORE
Moggi N.;Zucchelli S.
2020
Abstract
We report new results from the search for neutrinoless double-beta decay in Te130 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 1.7×1025 yr. We find no evidence for 0νββ decay and set a 90% credibility interval Bayesian lower limit of 3.2×1025 yr on the Te130 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.File | Dimensione | Formato | |
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