Democratic Approach To Atmospheric And Solar Neutrino Oscillations

Details Democratic Approach To Atmospheric And Solar Neutrino Oscillations Democratic Approach To Atmospheric And Solar Neutrino Oscillations

2002-08-16

arxiv.org/abs/hep-ph/0208162v2

Phys.Lett.B550:172-177,2002

Physics

High Energy Physics

High Energy Physics - Phenomenology

Version to appear in Physics Letters B

Scientific paper

10.1016/S0370-2693(02)02972-6

Working with a ${\cal U}(1)$ flavor symmetry, we show how the hierarchical structure in the charged fermion sector and a democratic approach for neutrinos that yields large solar and atmospheric neutrino mixings can be simultaneously realized in the MSSM framework. However, in SU(5) due to the unified multiplets we encounter difficulties. Namely, democracy for the neutrinos leads to a wrong hierarchical pattern for charged fermion masses and mixings. We discuss how this is overcome in flipped SU(5).

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