Large mixing angles for neutrinos from infrared fixed points

Details Large mixing angles for neutrinos from infrared fixed points Large mixing angles for neutrinos from infrared fixed points

2003-06-24

arxiv.org/abs/hep-ph/0306243v1

JHEP 0309 (2003) 048

Physics

High Energy Physics

High Energy Physics - Phenomenology

36 pages, 7 ps figures

Scientific paper

10.1088/1126-6708/2003/09/048

Radiative amplification of neutrino mixing angles may explain the large values required by solar and atmospheric neutrino oscillations. Implementation of such mechanism in the Standard Model and many of its extensions (including the Minimal Supersymmetric Standard Model) to amplify the solar angle, the atmospheric or both requires (at least two) quasi-degenerate neutrino masses, but is not always possible. When it is, it involves a fine-tuning between initial conditions and radiative corrections. In supersymmetric models with neutrino masses generated through the Kahler potential, neutrino mixing angles can easily be driven to large values at low energy as they approach infrared pseudo-fixed points at large mixing (in stark contrast with conventional scenarios, that have infrared pseudo-fixed points at zero mixing). In addition, quasi-degeneracy of neutrino masses is not always required.

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