U(2) and Maximal Mixing of nu_{mu}

Details U(2) and Maximal Mixing of nu_{mu} U(2) and Maximal Mixing of nu_{mu}

1998-11-10

arxiv.org/abs/hep-ph/9811299v2

Phys.Rev. D60 (1999) 033005

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, 1 figure

Scientific paper

10.1103/PhysRevD.60.033005

A U(2) flavor symmetry can successfully describe the charged fermion masses and mixings, and supress SUSY FCNC processes, making it a viable candidate for a theory of flavor. We show that a direct application of this U(2) flavor symmetry automatically predicts a mixing of 45 degrees for nu_mu to nu_s, where nu_s is a light, right-handed state. The introduction of an additional flavor symmetry acting on the right-handed neutrinos makes the model phenomenologically viable, explaining the solar neutrino deficit as well as the atmospheric neutrino anomaly, while giving a potential hot dark matter candidate and retaining the theory's predictivity in the quark sector.

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