Leptogenesis with supersymmetric Higgs triplets in TeV region

Abstract

The leptogenesis with supersymmetric Higgs triplets is studied in the light of experimental verification in the TeV region. The lepton number asymmetry appears just after the inflation via multiscalar coherent evolution of Higgs triplets and antislepton on a flat manifold. If the Higgs triplet mass terms dominate over the negative thermal-log term for the Hubble parameter H comparable to the Higgs triplet mass M_Δ, the asymmetry is fixed readily to some significant value by the redshift and rotation of these scalar fields, providing the sufficient lepton-to-entropy ratio n_L / s \sim 10^-10. This can be the case even with M_Δ\sim 1 TeV for the reheating temperature T_R \sim 10^6 GeV and the mass parameter M / λ\sim 10^22 GeV of the nonrenormalizable superpotential terms relevant for leptogenesis.

8 Pages, 2 figures. The discussion about the stability of the VEV's of the Higgs triplets is added