Abstract
Neutrinoless double-beta decay is a uniquely sensitive probe of lepton number violating processes, and its observation may answer fundamental questions in neutrino physics, including the nature and the mass scale of the light neutrinos. Tracking calorimeter experiments have particular strengths, including the ability to search for neutrinoless double-beta decay amongst several different isotopes hosted in source foils. Full event reconstruction provides powerful background rejection capability, and the ability to disentangle different mechanisms for neutrinoless double-beta decay in the event of its discovery. These proceedings will give the latest results from the NEMO-3 experiment, including new double-beta decay measurements using the isotopes 48Ca and 150Nd. The current status and future prospects for the SuperNEMO experiment will also be presented.
Highlights
The great strength of this technique lies in its particle identification capability; α-particles can be identified as short, straight tracks, even without dE/dx information, and e+/e− discrimination is possible in an externally applied magnetic field
Analysis Techniques The results presented here arise from several separate analyses of NEMO-3 data
For the hypothesis of light-Majorana neutrino exchange, the following half-life limit is obtained : T10/ν2ββ > 1.1 × 1024 yr (90% C.L.), which corresponds to a limit on the effective Majorana neutrino mass mν < 0.3 − 0.6 eV, where the range reflects nuclear matrix element (NME) uncertainties
Summary
To cite this article: David Waters and NEMO-3 and SuperNEMO Collaborations 2017 J. View the article online for updates and enhancements. - Predictions for neutrinoless double-beta decay in the 3+1 sterile neutrino scenario C Giunti and E M Zavanin. - Surface-alpha backgrounds for the Majorana neutrinoless double-beta decay experiment T H Burritt, R A Johnson, J F Wilkerson et al. - Construction and commissioning of the tracker module for the SuperNEMO experiment Michele Cascella, Ashwin Chopra, Lauren Dawson et al. Neutrino2016 IOP Conf.
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