Minimal supersymmetric SO(10) GUT with only doublet Higgs

We extend the study of a supersymmetric SO(10) GUT with only doublet Higgs scalars. Among the GUTs with only doublet Higgs scalars, this is the minimal model. The fermion mass problem is naturally solved by an effective operator, which may have several origins. R-parity is conserved implying a stable LSP which can explain the dark matter of the universe. The neutrino mass problem may be solved by type I or type III see-saw mechanism. In one case b−τ unification explains the large neutrino mixing angles for the atmospheric and solar neutrinos. The baryon asymmetry of the universe is explained through leptogenesis taking care of gravitino problem.