Thermal Wash-in Leptogenesis via Heavy Higgs Decay
arxiv(2024)
Abstract
We present a conceptually simple model to generate asymmetries that are not
directly related to baryon nor lepton charges. The model employs a three-Higgs
doublet framework, wherein the other two Higgs fields are significantly heavier
than the Standard Model (SM) Higgs field. The decay of these heavier Higgs
fields generates asymmetry for approximately conserved charges in the Standard
Model at a high temperature. These asymmetries will be converted into
baryon/lepton asymmetry through B-L violating interactions associated with
right-handed neutrinos via the wash-in mechanism.
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