Search for Neutrinoless Double-Beta Decay of $^{100}$Mo with the NEMO-3 Detector

R. Arnold 1 C. Augier 2 J. D. Baker A. S. Barabash A. Basharina-Freshville S. Blondel 2 S. Blot M. Bongrand 2 V. Brudanin J. Busto 3 A. J. Caffrey C. Cerna 4 A. Chapon 5 E. Chauveau D. Duchesneau 6 D. Durand 5 V. Egorov G. Eurin J. J. Evans R. Flack X. Garrido 2 H. Gómez 2 B. Guillon 5 P. Guzowski R. Hodák P. Hubert 4 C. Hugon 4 Sophie Jullian 2 A. Klimenko O. Kochetov S. I. Konovalov V. Kovalenko D. Lalanne 2 K. Lang Y. Lemière 5 Z. Liptak P. Loaiza 7 G. Lutter 4 F. Mamedov Catherine Marquet 4 F. Mauger 5 B. Morgan J. Mott I. Nemchenok M. Nomachi F. Nova F. Nowacki 1 H. Ohsumi R. B. Pahlka F. Perrot 4 F. Piquemal P. Povinec Y. A. Ramachers A. Remoto 6 J. L. Reyss B. Richards C. L. Riddle E. Rukhadze R. Saakyan X. Sarazin 2 Yu. Shitov L. Simard F. Šimkovic A. Smetana K. Smolek A. Smolnikov S. Söldner-Rembold B. Soulé 4 I. Štekl J. Suhonen C. S. Sutton G. Szklarz 2 J. Thomas V. Timkin S. Torre Vl. I. Tretyak V. I. Tretyak V. I. Umatov I. Vanushin C. Vilela V. Vorobel D. Waters A. Žukauskas
Abstract : We report the results of a search for the neutrinoless double-$\beta$ decay (0$\nu\beta\beta$) of $^{100}$Mo, using the NEMO-3 detector to reconstruct the full topology of the final state events. With an exposure of 34.7 kg.y, no evidence for the 0$\nu\beta\beta$ signal has been found, yielding a limit for the light Majorana neutrino mass mechanism of $T_{1/2}(0\nu\beta\beta)>1.1 \times 10^{24}$ 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 $< m_{\nu} > < 0.3-0.8$ eV (90% C.L.). Constraints on other lepton number violating mechanisms of 0$\nu\beta\beta$ 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.y.
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R. Arnold, C. Augier, J. D. Baker, A. S. Barabash, A. Basharina-Freshville, et al.. Search for Neutrinoless Double-Beta Decay of $^{100}$Mo with the NEMO-3 Detector. Physical Review D, American Physical Society, 2014, 89, pp.111101. ⟨10.1103/PhysRevD.89.111101⟩. ⟨in2p3-00912877⟩

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