1998/12/01 by A. Geiser · 2 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #MAJORANA #Measurements of neutrino speed #Mixing (physics) #Neutrino #Neutrino Physics Research #Neutrino oscillation #Oscillation (cell signaling) #Particle physics theoretical and experimental studies #Solar neutrino #Solar neutrino problem #Sterile neutrino #hep-ph
paper · pdf · doi:10.1016/s0370-2693(98)01419-1
published as Phys.Lett.B444:358,1999 · 13 pages, 1 figure, revised for publication in Phys. Lett. B
openalex publication_date 1998/12/01 · arxiv created 1999/01/27 · arxiv updated 2014/11/17 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A solution for the neutrino mass and mixing pattern is proposed which is compatible with all available experimental data on neutrino oscillations. This solution involves Majorana neutrinos of the pseudo-Dirac type, i.e. mMajorana << mDirac. The solar and atmospheric neutrino observations are mainly explained as nue - nueS and numu - numuS oscillations, where S indicates the sterile (``righthanded'') partner of each neutrino generation, while the LSND result is interpreted in terms of standard numu - nue oscillations. The resulting constraints on numu - nutau and nutau - nutauS oscillations are also discussed. This solution leaves room for a hierarchical mass and mixing scheme with a nutau mass in the few eV range, as favoured by some dark matter scenarios. The apparent conflict with standard Big Bang nucleosynthesis is addressed and the implications for current and future experiments are discussed. It is argued that both short and long baseline accelerator neutrino experiments are needed in order to decide between this solution and other oscillation scenarios.