A three-Higgs-doublet inflation model with a complex coupling to gravity can produce a scalar matter-antimatter asymmetry that electroweak sphalerons convert into a baryon asymmetry.
Dynamical CP Violation in the Early Universe and Leptogenesis
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In a recent publication, we suggested a mechanism for obtaining dynamical CP violation in the early Universe based on the out-of-equilibrium evolution of complex scalar fields. In this paper, we suggest several ways of transferring the CP asymmetry from the scalar sector to the leptonic sector. In particular, we point out how a ``transient MNS(P) matrix'' can generate an asymmetry between fermions and anti-fermions directly.
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Baryogenesis from Primordial CP Violation
A three-Higgs-doublet inflation model with a complex coupling to gravity can produce a scalar matter-antimatter asymmetry that electroweak sphalerons convert into a baryon asymmetry.