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Search for neutrinoless double-beta decay of Mo100 with the NEMO-3 detector

R. Arnold et al. (NEMO-3 Collaboration)
Phys. Rev. D 89, 111101(R) – Published 12 June 2014

Abstract

We report the results of a search for the neutrinoless double-β decay (0νββ) of Mo100, using the NEMO-3 detector to reconstruct the full topology of the final state events. With an exposure of 34.7kg·y, no evidence for the 0νββ signal has been found, yielding a limit for the light Majorana neutrino mass mechanism of T1/2(0νββ)>1.1×1024 years (90% C.L.) once both statistical and systematic uncertainties are taken into account. Depending on the nuclear matrix elements this corresponds to an upper limit on the Majorana effective neutrino mass of mν<0.30.9eV (90% C.L.). Constraints on other lepton number violating mechanisms of 0νββ decays are also given. Searching for high-energy double electron events in all suitable sources of the detector, no event in the energy region [3.2–10] MeV is observed for an exposure of 47kg·y.

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  • Received 15 November 2013

DOI:https://doi.org/10.1103/PhysRevD.89.111101

© 2014 American Physical Society

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Vol. 89, Iss. 11 — 1 June 2014

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