1999/07/31 by M. Flanz, W. Rodejohann, Werner Rodejohann +2 · 2 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1007/s100520000422
published as Eur.Phys.J.C16:453-460,2000 · 19 pages, 7 figures, revised version to appear in Eur. Phys. J
arxiv created 2000/06/26 · openalex publication_date 2000/09/01 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The lepton-number violating process νμN → μ- μ+ μ+ X is studied for the first time in connection with Majorana neutrino masses of the second generation. The sensitivity for light and heavy Majorana neutrinos is investigated. The ratio with respect to the standard model charged current process is improved by some orders of magnitude if compared to previously discussed Majorana induced ΔLμ = 2 processes. Non-observation of this process in previous experiments allows to demand the effective mass to be < mμμ > \ls 104 GeV, being more stringent than previously discussed direct bounds, however still unnaturally high. Therefore, in the forseeable future, indirect bounds on effective masses other than mee will be more stringent.