Annihilating Leptogenesis
arXiv:0903.3473 · doi:10.1016/j.physletb.2009.07.029
Abstract
Leptogenesis is usually realized through decays of heavy particles. In this article we consider another possibility of generating a lepton asymmetry through annihilations of heavy particles. We demonstrate our idea with a realistic extension of the standard model containing a heavy doublet and a light singlet scalars in addition to right-handed neutrinos and Higgs triplets required for type-I+II seesaw of neutrino masses. We also clarify that this annihilating leptogenesis scenario can be naturally embedded in more fundamental theories, like left-right symmetric models or grand unified theories.
5 pages, 2 figures. A singlet scalar as dark matter is introduced to solve the flaw of the overabundant relic density in the original model. References added, typos corrected and title changed. Accepted by PLB
References in corpus (15)
- Gauge Singlet Scalars as Cold Dark Matter
- The Minimal Model of Nonbaryonic Dark Matter: A Singlet Scalar
- A lower bound on the right-handed neutrino mass from leptogenesis
- Resonant Leptogenesis
- Leptogenesis for Pedestrians
- Towards a complete theory of thermal leptogenesis in the SM and MSSM
- CP violating decays in leptogenesis scenarios
- Leptogenesis as the origin of matter
- Baryogenesis from a Lepton Asymmetric Universe
- Cosmic Microwave Background, Matter-Antimatter Asymmetry and Neutrino Masses
- CP Asymmetry in Majorana Neutrino Decays
- The Neutrino Mass Window for Baryogenesis
- Consequences of Triplet Seesaw for Leptogenesis
- Resonant τ-Leptogenesis with Observable Lepton Number Violation
- Scalar Dark Matter Effects in Higgs and Top Quark Decays
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- Asymmetric Dark Matter and CP Violating Scatterings in a UV Complete Model
- Leptogenesis, Dark Matter and Gravitational Waves from Discrete Symmetry Breaking
- Revisiting the role of CP-conserving processes in cosmological particle-antiparticle asymmetries