Large Angle MSW Solution in Grand Unified Theories with SU(3) X U(1) Horizontal Symmetry

Details Large Angle MSW Solution in Grand Unified Theories with SU(3) X U(1) Horizontal Symmetry Large Angle MSW Solution in Grand Unified Theories with SU(3) X U(1) Horizontal Symmetry

2000-08-25

arxiv.org/abs/hep-ph/0008269v2

Phys.Rev. D63 (2001) 016008

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, 6 figures, references added

Scientific paper

10.1103/PhysRevD.63.016008

We construct a model with a SU(3) X U(1) horizontal symmetry in the context of Grand Unified Theories. In our models, the bi-maximal lepton mixing and suitable neutrino masses for the large angle MSW solution are obtained without any fine-tuning due to the spontaneously broken SU(3)_H symmetry. The three generations of quarks and leptons are unified as members of the SU(3)_H fundamental representation, and the U(1)_H charge gives the origin of the fermion mass hierarchy and mixing angles. We present two explicit examples of SU(5)_GUT and SO(10)_GUT models, in which the Yukawa structures are given successfully.

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