Examining leptogenesis with lepton flavor violation and the dark matter abundance
arXiv:1006.2857 · doi:10.1007/JHEP11(2010)038
Abstract
Within a supersymmetric (SUSY) type-I seesaw framework with flavor-blind universal boundary conditions, we study the consequences of requiring that the observed baryon asymmetry of the Universe be explained by either thermal or non-thermal leptogenesis. In the former case, we find that the parameter space is very constrained. In the bulk and stop-coannihilation regions of mSUGRA parameter space (that are consistent with the measured dark matter abundance), lepton flavor-violating (LFV) processes are accessible at MEG and future experiments. However, the very high reheat temperature of the Universe needed after inflation (of about 10^{12} GeV) leads to a severe gravitino problem, which disfavors either thermal leptogenesis or neutralino dark matter. Non-thermal leptogenesis in the preheating phase from SUSY flat directions relaxes the gravitino problem by lowering the required reheat temperature. The baryon asymmetry can then be explained while preserving neutralino dark matter, and for the bulk or stop-coannihilation regions LFV processes should be observed in current or future experiments.
20 pages, 5 figures, 1 table
References in corpus (18)
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
- Big-Bang Nucleosynthesis and Gravitino
- Flavour Matters in Leptogenesis
- Physics at Super B Factory
- Constraints on the Reheating Temperature in Gravitino Dark Matter Scenarios
- Flavoured leptogenesis: a successful thermal leptogenesis with N_1 mass below 10^8 GeV
- New aspects of leptogenesis bounds
- Full Boltzmann equations for leptogenesis including scattering
- Medium corrections to the CP-violating parameter in leptogenesis
- Successful type I Leptogenesis with SO(10)-inspired mass relations
- Search for Lepton Flavor Violating tau Decays into Three Leptons
- Effects of reheating on leptogenesis
- Successful Leptogenesis in SO(10) Unification with a Left-Right Symmetric Seesaw Mechanism
- Neutrino sector impacts SUSY dark matter
- Quark-Lepton Unification and Eight-Fold Ambiguity in the Left-Right Symmetric Seesaw Mechanism
- Supersymmetric Leptogenesis and the Gravitino Bound
- SUSY dark matter and lepton flavor violation
- Supersymmetric Leptogenesis with a Light Hidden Sector