Minimal family unification
Paul H. Frampton, Thomas W. Kephart · Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields · 1995
It is proposed that there exists, within a new SU(2)', a gauged discrete group ${\mathit{Q}}_{6}$ (the order 12 double dihedral group) acting as a family symmetry. This non-Abelian finite group can explain hierarchical features of families, using an assignment for quarks and leptons dictated by the requirements of anomaly cancellation and of no additional quarks.