SU(7) SUSY GUTs with a natural intermediate scale
Ilia Gogoladze
Abstract
We investigate the SU(N) supersymmetric Grand Unified Theories with ``custodial symmetry'' mechanism to explane the doublet-triplet hierarchy. We show that in such type of SU(7) SUSY theory intermediate scale appears naturally and the correct value for sin2(θ)W is predicted via vector-like matter superfields splitting. The unification appears to be closed to MPl for all the reasonable values of αs and MSUSY. Due to the large unification scale the baryon number violating d=5 operator is suppressed in comparison with that in minimal SU(5) theory.
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