Quark and lepton mass matrices in the SO(10) grand unified theory with generation flipping

1999/03/31 by Yasunori Nomura, Takashi Sugimoto · 12 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Electron #Fermion #Grand Unified Theory #Lepton #MAJORANA #Mass matrix #Mixing (physics) #Multiplet #Neutrino #Neutrino Physics Research #Neutrino oscillation #Nuclear physics #Oscillation (cell signaling) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Quark #SO(10) #hep-ph

paper · pdf · doi:10.1103/physrevd.61.093003

published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 61(9) (American Physical Society) · 28 pages, Latex

arxiv created 2000/01/19 · openalex publication_date 2000/04/03 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We investigate the SO(10) grand unified model with generation flipping. The model contains one extra matter multiplet \ensuremathψ(10) and it mixes with the usual matter multiplets \ensuremathψ_i(16) when SO(10) is broken down to SU(5). We find the parameter region of the model in which the observed quark masses and mixings are well reproduced. The resulting parameter region is consistent with the observation that only \ensuremathψ_i(16) have a source of hierarchies and indicates that the mixing between second and third generations tends to be large in the lepton sector, which is consistent with the observed maximal mixing of the atmospheric neutrino oscillation. We also show that the model can accommodate MSW and vacuum oscillation solutions to the solar neutrino deficit depending on the form of the Majorana mass matrix for the right-handed neutrinos.

Citations

• Large lepton mixing in seesaw models - Coset-space family unification -
• Implications of CHOOZ results for the decoupling of solar and atmospheric neutrino oscillations
• Remarks on the Unified Model of Elementary Particles
• Commutator of the Quark Mass Matrices in the Standard Electroweak Model and a Measure of MaximalCPNonconservation
• A new lepton-quark mass relation in a unified theory
• Unity of All Elementary-Particle Forces
• Observation of a small atmospheric vμ/ve ratio in Kamiokande
• Lepton number as the fourth "color"
• CP-Violation in the Renormalizable Theory of Weak Interaction
• Measurements of the Solar Neutrino Flux from Super-Kamiokande's First 300 Days
• Neutrino Masses in E6 Unification