Natural realizations of the seesaw mechanism in miniwarped minimal SO(10)

Abstract

The minimal SUSY SO(10) GUT models with 10, 126 and 210 Higgs and only renormalizable couplings has been shown to provide a simple way to understand the neutrino mixings as well as the ratio ∆m 2 ⊙ /∆m 2 A in terms of quark mixing parameter θ Cabibbo , provided neutrino masses are described by type II seesaw formula. However, in this minimal picture, it is impossible to realize type II dominance with renormalizable couplings in 4-dimensions. We show that this problem can be cured by embedding this model into a warped 5-dimensional space time with warping between the Planck and the GUT scale, where both type II as well as mixed seesaw formulae can be realized in a natural manner without expanding the Higgs sector. These models also avoid the possible problem of threshold effects associated with large Higgs representations since the theory above the GUT scale is now strongly coupled. *

Discrete flavor symmetries and models of neutrino mixing

“…This needs widely different scales for v L and v R in the model and much of the description of the corresponding dynamics, along the lines of refs. [236,237], remains to be studied in detail. In both of these models the discussion of the alignment is not satisfactory.…”

Simple SO(10) GUT in five dimensions

“…This idea has been utilized in an extended model proposed in Ref. [12], where the so-called type II seesaw mechanism dominates to realize the tiny neutrino masses through the warped geometry.…”

Simple 5D SO(10) GUT and sparticle masses

“…In this scenario, the Anti-de Sitter curvature and the fifth dimensional radius were chosen so as to realize the GUT scale as an effective cutoff scale in 4-dimensional effective theory. This idea has been utilized in an extended model proposed in [12], where the so-called type II seesaw mechanism dominates to realize the tiny neutrino masses through the warped geometry. In both models, the SO(10) gauge symmetry was considered to be broken by Higgs multiplets on branes as usual in 4-dimensional models.…”