2000/08/31 by E. Kh. Akhmedov, E.Kh. Akhmedov, G.C. Branco +5 · 45 citations
Physics and Astronomy · #Dirac (video compression format) #MAJORANA #Mass matrix #Mixing (physics) #Neutrino #Neutrino Physics Research #Neutrino oscillation #Noncommutative and Quantum Gravity Theories #Particle physics theoretical and experimental studies #Seesaw mechanism #Seesaw molecular geometry #Sterile neutrino #hep-ph
paper · pdf · doi:10.1016/s0370-2693(00)01323-x
published in Physics Letters B 498(3-4), 237-250 (Elsevier BV) · LaTeX, 17 pages, 2 eps figures. A section on RGE evolution and a few references added; minor typos corrected
arxiv created 2000/10/18 · openalex publication_date 2001/01/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In the framework of a minimal extension of the SM, where the only additional fields are three right-handed neutrinos, we suggest that the charged lepton, the Dirac neutrino and the right-handed Majorana neutrino mass matrices are all, to leading approximation, proportional to the democratic matrix. With the further assumption that the breaking of this extended democracy is universal for all leptonic mass matrices, a large mixing in the 2-3 sector can be obtained and is linked to the seesaw mechanism, together with the existence of a strong hierarchy in the masses of right-handed neutrinos. The structure of the resulting effective mass matrix of light neutrinos is stable against the RGE evolution, and a good fit to all solar and atmospheric neutrino data is obtained.