2003/04/13 by T. Asaka · 1 citation
Physics and Astronomy · #Baryon asymmetry #Cosmology and Gravitation Theories #Grand Unified Theory #Inflation (cosmology) #Leptogenesis #Lepton #Mass matrix #Neutrino #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Quark #Supersymmetry #Theoretical physics #hep-ph
paper · pdf · doi:10.1016/s0370-2693(03)00611-7
published as Phys.Lett. B562 (2003) 291-298 · 12 pages
arxiv created 2003/04/13 · openalex publication_date 2003/05/13 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Lopsided structure in mass matrices of down quarks and leptons gives a simple explanation for the observed large angles of neutrino mixings. We realize such mass matrices by the Froggatt–Nielsen mechanism in the framework of supersymmetric SO(10) grand unified theory (GUT). It is shown that the model can reproduce the successful mass matrices which have been obtained in SU(5) models. Cosmological implication of the model is also discussed. We show that the hybrid inflation occurs naturally in the model and it offers non-thermal leptogenesis by decays of the next-to-lightest right-handed neutrinos. The present baryon asymmetry is explained by just the oscillation mass scale in the atmospheric neutrinos.