Dihedral Families of Quarks, Leptons and Higgs Bosons

Details Dihedral Families of Quarks, Leptons and Higgs Bosons Dihedral Families of Quarks, Leptons and Higgs Bosons

2004-11-17

arxiv.org/abs/hep-ph/0411226v2

Phys.Rev. D71 (2005) 056006

Physics

High Energy Physics

High Energy Physics - Phenomenology

27 pages, 8 figures

Scientific paper

10.1103/PhysRevD.71.056006

We consider finite groups of small order for family symmetry. It is found that the binary dihedral group Q_6, along with the assumption that the Higgs sector is of type II, predicts mass matrix of a nearest neighbor interaction type for quarks and leptons. We present a supersymmetric model based on Q_6 with spontaneously induced CP phases. The quark sector contains 8 real parameters with one independent phase to describe the quark masses and their mixing. Predictions in the |V_{ub}|-bar{eta}, |V_{ub}|-sin 2 beta(phi_1) and |V_{ub}|-|V_{td}/V_{ts}| planes are given. The lepton sector contains also 9 parameters. A normal as well as an inverted spectrum of neutrino masses is possible, and we compute V_{e3}. We find that |V_{e3}|^2 > 10^{-4} in the case of a normal spectrum, and |V_{e3}|^2 >8 10^{-4} in the case of an inverted spectrum. It is also found that Q_6 symmetry forbids all Baryon number violating terms of d=4, and the contributions to EDMs from the A terms vanish in this model.

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