2005/02/14 by S. M. Barr
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1016/j.physletb.2005.06.087
published as Phys.Lett.B622:131-135,2005 · 12 pages, 5 figures, LaTex
arxiv created 2005/02/14 · openalex publication_date 2005/07/13 · arxiv updated 2011/05/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
One puzzle of neutrino masses and mixings is that they do not exhibit the kind of strong "hierarchy" that is found for the quarks and charged leptons. Neutrino mass ratios and mixing angles are not small. A possible reason for this is proposed here. It is based on the fact that typical realistic grand unified models contain particles with unification-scale masses which, when integrated out, can yield a neutrino mass matrix that is not of the standard seesaw form.