2006/03/31 by Alison Demaria, Catherine I. Low, Raymond R. Volkas
Physics and Astronomy · #Black Holes and Theoretical Physics #Fermion #Gauge (firearms) #Gauge group #Gauge symmetry #Gauge theory #Grand Unified Theory #Lepton #MAJORANA #Neutrino #Neutrino Physics Research #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Proton decay #Quark #Standard Model (mathematical formulation) #hep-ph
paper · pdf · doi:10.1103/physrevd.74.033005
published as Phys.Rev. D74 (2006) 033005 · 12 pages, minor changes. To appear in Phys. Rev.D
arxiv created 2006/07/20 · openalex publication_date 2006/08/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The idea of quark-lepton universality at high energies has recently been explored in unified theories based upon the quartification gauge group SU(3)4. These schemes encompass a quark-lepton exchange symmetry that results upon the introduction of leptonic color. It has been demonstrated that, in models in which the quartification gauge symmetry is broken down to the standard model gauge group, gauge coupling constant unification can be achieved, and there is no unique scenario. The same is also true when the leptonic color gauge group is only partially broken, leaving a remnant SU(2)_\ensuremathℓ symmetry at the standard model level. Here we perform an analysis of the neutrino mass spectrum of such models. We show that these models do not naturally generate small Majorana neutrino masses, thus correcting an error in our earlier quartification paper, but with the addition of one singlet neutral fermion per family there is a realization of seesaw suppressed masses for the neutrinos. We also show that these schemes are consistent with proton decay.