Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2007-04-24
Phys.Rev.D76:015013,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
20 pages and one figure
Scientific paper
10.1103/PhysRevD.76.015013
The minimal SUSY SO(10) GUT models with {\bf 10}, {\bf 126} and {\bf 210} Higgs and only renormalizable couplings has been shown to provide a simple way to understand the neutrino mixings as well as the ratio $\Delta m^2_\odot/\Delta m^2_A$ in terms of quark mixing parameter $\theta_{Cabibbo}$, 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.
Mohapatra Rabindra N.
Okada Nobuchika
Yu Hai-Bo
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