Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-08-28
Phys.Rev.D59:011702,1999
Physics
High Energy Physics
High Energy Physics - Phenomenology
6 pages Revtex; UMD-PP-99-016
Scientific paper
10.1103/PhysRevD.59.011702
We present a new approach to realizing the Dimopoulos-Wiczek mechanism for doublet-triplet splitting in supersymmetric SO(10). The method can be used to achieve strong suppression of proton decay in a straightforward manner and is relatively economical; in particular the particle spectrum required for its implementation is consistent with the constraints from string compactification at Kac-Moody level two. We construct two examples of realistic models based on this idea. These models have no unwanted flat directions and do not make use of any nonrenormalizable operators to stabilize the vacuum thereby maintaining coupling constant unification as a prediction. The first model is characterised by a simple discrete symmetry that guarantees naturalness at the renormalizable level while also eliminating all potentially dangerous R-parity violating effects. The second model predicts the strong suppression of Higgsino mediated proton decay. In both models the light MSSM doublets emerge from two different {\bf 10}'s so that there is considerable flexibility in constructing realistic fermion masses and CKM angles.
Chacko Zackaria
Mohapatra Rabindra N.
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