  We consider an extended supersymmetric SO(10) seesaw model with only doublet
Higgs scalars, in which neutrino masses are suppressed by the scale of D-parity
violation. Leptogenesis can occur at the TeV scale through the decay of a
singlet Sigma, thereby avoiding the gravitino crisis. Washout of the asymmetry
can be effectively suppressed by the absence of direct couplings of Sigma to
leptons.

High Energy Physics - Phenomenology