Proton Decay and Flavor Violating Thresholds in SO(10) Models
- Department of Physics, Texas A and M University, College Station, Texas 77843-4242 (United States)
- Department of Physics, University of Maryland, College Park, Maryland 20742 (United States)
Discovery of neutrino mass has put the spotlight on the supersymmetric (SUSY) SO(10) model as a natural candidate for grand unification of forces and matter. However, the suppression of proton decay is a major problem in such SUSY grand unified models. In this Letter we show how to alleviate this problem by simple threshold effects which raise the colored Higgsino masses and the grand unification scale to > or approx. 10{sup 17} GeV. There exist only four types of fields arising from different SO(10) representations which can generate this kind of threshold effect. 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}.
- OSTI ID:
- 21128116
- Journal Information:
- Physical Review Letters, Vol. 100, Issue 18; Other Information: DOI: 10.1103/PhysRevLett.100.181801; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Proton Decay and Flavor Violating Thresholds in SO(10) Models