Proton Decay and Flavor Violating Thresholds in SO(10) Models

Details Proton Decay and Flavor Violating Thresholds in SO(10) Models Proton Decay and Flavor Violating Thresholds in SO(10) Models

2007-12-07

arxiv.org/abs/0712.1206v1

Phys.Rev.Lett.100:181801,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.100.181801

Discovery of neutrino mass has put the spotlight on supersymmetric SO(10) as a natural candidate for grand unification of forces and matter. However, the suppression of proton decay is a major problem in any supersymmetric grand unified models. In this paper we show how to alleviate this problem by simple threshold effect which raises the colored Higgsino masses and the grand unification scale to \gtrsim 10^{17} GeV. There exist only four types of fields arising from different SO(10) representations which can generate this kind of threshold effects. Some of these fields also generate a sizable flavor violation in the quark sector compared to the lepton sector. The b-\tau unification can work in these types of models even for intermediate values of tan\beta.

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