Leptogenesis via flat direction with a gauged
arXiv:hep-ph/0109154 · doi:10.1103/PhysRevD.65.043511
Abstract
We study the supersymmetric leptogenesis via flat direction with a gauged symmetry. We find that the resultant baryon asymmetry is enhanced compared with the case without a gauged symmetry. The baryon asymmetry is proportional to the reheating temperature of inflation, but it is independent of the gravitino mass. If high reheating temperatures of inflation $T_{R}\sim 10^{10}\GEV$ are available, the mass of the lightest neutrino, $m_{ν1}\sim 10^{-4}\EV$, is small enough to explain the baryon asymmetry in the present universe. Furthermore, the gravitino mass independence of the produced baryon asymmetry allows us to explain the present baryon asymmetry even in low energy SUSY breaking scenarios such as gauge-mediation models. Our leptogenesis scenario is also very special in the sense that it is completely free from the serious Q-ball formation problem.
arXiv comment27 pages, LaTeX, 5 figures
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- Neutralino Dark Matter from MSSM Flat Directions in light of WMAP Result
- Stabilizing dilaton and baryogenesis
- Hubble-induced radiative corrections and Affleck-Dine Baryogenesis
- Affleck-Dine baryogenesis in anomaly-mediated SUSY breaking
- Predictions on the neutrinoless double beta decay from the leptogenesis via the LHu flat direction
- Flat manifold leptogenesis in the supersymmetric standard model
- Neutrino Masses, Baryon Asymmetry, Dark Matter and the Moduli Problem : A Complete Framework
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