2013/11/30 by 3 Collaboration, R. Arnold, Joy Don Baker +91 · 7 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ex #nucl-ex
paper · pdf · doi:10.1103/physrevd.89.111101
published as Phys. Rev. D 89, 111101 (2014)
openalex publication_date 2014/06/12 · arxiv created 2014/06/20 · arxiv updated 2014/06/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We report the results of a search for the neutrinoless double-\ensuremathβ decay (0\ensuremathν\ensuremathβ\ensuremathβ) of 100Mo, using the NEMO-3 detector to reconstruct the full topology of the final state events. With an exposure of 34.7 kg\ifmmode⋅\else\textperiodcentered\fiy, no evidence for the 0\ensuremathν\ensuremathβ\ensuremathβ signal has been found, yielding a limit for the light Majorana neutrino mass mechanism of T1/2(0\ensuremathν\ensuremathβ\ensuremathβ)>1.1\ifmmode×\else\texttimes\fi1024 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 ⟨m_\ensuremathν⟩<0.3--0.9 eV (90% C.L.). Constraints on other lepton number violating mechanisms of 0\ensuremathν\ensuremathβ\ensuremathβ 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 47 kg\ifmmode⋅\else\textperiodcentered\fiy.