2005/05/09 by Rabindra N. Mohapatra, R. N. Mohapatra, Salah Nasri +2 · 2 citations
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Neutrino #Neutrino Physics Research #Neutrino oscillation #Particle physics #Particle physics theoretical and experimental studies #Physics #Right handed #Seesaw molecular geometry #Sterile neutrino #hep-ph
paper · pdf · doi:10.1103/physrevd.72.033007
published as Phys.Rev.D72:033007,2005 · 13 pages and one figure; model extended to 3+2 case
arxiv created 2005/05/09 · openalex publication_date 2005/08/08 · arxiv updated 2014/11/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We show that a double seesaw framework for neutrino masses with \ensuremathμ\ensuremath-\ensuremathτ exchange symmetry can lead to one of the right-handed seesaw partners of the light neutrinos being massless. This can play the role of a light sterile neutrino, giving a 3+1 model that explains the Liquid Scintillator Neutrino Detector (LSND) results. We get a very economical scheme, which makes it possible to predict the full 4\ifmmode×\else\texttimes\fi4 neutrino mass matrix if CP is conserved. Once CP violation is included, the effect of the LSND mass range sterile neutrino is to eliminate the lower bound on neutrinoless double beta decay rate which exists for the three neutrino case with inverted mass hierarchy. The same strategy can also be used to generate a natural 3+2 model for LSND, which is also equally predictive for the CP conserving case in the limit of exact \ensuremathμ\ensuremath-\ensuremathτ symmetry.