How a Non-hierarchical Neutrino Mass Matrix Can Arise

Details How a Non-hierarchical Neutrino Mass Matrix Can Arise How a Non-hierarchical Neutrino Mass Matrix Can Arise

2005-02-14

arxiv.org/abs/hep-ph/0502129v1

Phys.Lett.B622:131-135,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 5 figures, LaTex

Scientific paper

10.1016/j.physletb.2005.06.087

One puzzle of neutrino masses and mixings is that they do not exhibit the kind of strong "hierarchy" that is found for the quarks and charged leptons. Neutrino mass ratios and mixing angles are not small. A possible reason for this is proposed here. It is based on the fact that typical realistic grand unified models contain particles with unification-scale masses which, when integrated out, can yield a neutrino mass matrix that is not of the standard seesaw form.

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