Baryogenesis from Mixing of Lepton Doublets
arXiv:1210.0553 · doi:10.1016/j.nuclphysb.2012.11.021
Abstract
It is shown that the mixing of lepton doublets of the Standard Model can yield sizeable contributions to the lepton asymmetry, that is generated through the decays of right-handed neutrinos at finite temperature in the early Universe. When calculating the flavour-mixing correlations, we account for the effects of Yukawa as well as of gauge interactions. We compare the freeze-out asymmetry from lepton-doublet mixing to the standard contributions from the mixing and direct decays of right-handed neutrinos. The asymmetry from lepton mixing is considerably large when the mass ratio between the right-handed neutrinos is of order of a few, while it becomes Maxwell-suppressed for larger hierarchies. For an intermediate range between the case of degenerate right-handed neutrinos (resonant Leptogenesis) and the hierarchical case, lepton mixing can yield the main contribution to the lepton asymmetry.
25 pages
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Cited by in corpus (14)
- The Phenomenology of Right Handed Neutrinos
- Dark Matter, Baryogenesis and Neutrino Oscillations from Right Handed Neutrinos
- Kadanoff-Baym Approach to Flavour Mixing and Oscillations in Resonant Leptogenesis
- Scattering Rates For Leptogenesis: Damping of Lepton Flavour Coherence and Production of Singlet Neutrinos
- Why is there more matter than antimatter? Calculational methods for leptogenesis and electroweak baryogenesis
- Systematic approach to thermal leptogenesis
- Strong Washout Approximation to Resonant Leptogenesis
- Right-Handed Neutrino Production at Finite Temperature: Radiative Corrections, Soft and Collinear Divergences
- Lepton asymmetry from mixing and oscillations
- Cuts, Cancellations and the Closed Time Path: The Soft Leptogenesis Example
- Flavour mixing transport theory and resonant leptogenesis
- Primordial Lepton Oscillations and Baryogenesis
- Phenomenology of Baryogenesis from Lepton-Doublet Mixing
- A Scotogenic Model as a Prototype for Leptogenesis with One Single Gauge Singlet