arXiv:hep-ph/0608006·v1·High Energy Physics — Phenomenology
Thermal leptogenesis in extended supersymmetric seesaw
M. Hirsch🇪🇸 · M. Malinsky🇬🇧 · J.C. Romao🇵🇹 · U. Sarkar🇮🇳 · J.W.F. Valle🇪🇸
Abstract
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.
Comments: 4 pages, 5 figures