MASATO SENAMI
Department of Nuclear Engineering, Kyoto University, Kyoto 606-8501, Japan
Address after April 2004: Institute for Cosmic Ray Research, University of Tokyo, Kashiwa City, Chiba 277-8582, Japan
KATSUJI YAMAMOTO
Department of Nuclear Engineering, Kyoto University, Kyoto 606-8501, Japan

Received 6 July 2004
Revised 24 October 2005

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 ~ 10^-10. This can be the case even with M_Δ ~ 1 TeV for the reheating temperature T_R ~ 10⁶ GeV and the mass parameter M/λ ~ 10²² GeV of the nonrenormalizable superpotential terms relevant for leptogenesis.

Leptogenesis; Higgs triplet; supersymmetry; neutrino mass
PACS numbers: 14.80.Cp, 98.80.Cq, 14.60.Pq