Speaker
Description
We perform an analysis of leptogenesis in the context of a simple extension of the Standard Model with two fermions, one charged ($\chi $) and one neutral ($\psi$), in addition to three right-handed neutrinos, interacting through a charged gauge singlet scalar $S$. The dark sector ($\chi$, $\psi$ and $S$) interacts feebly and produces a relic density consistent with the existing data. The right-handed neutrinos decay into the charged scalar $S$ and a lepton, providing an additional source of CP asymmetry, along with contributing through the virtual exchange of $S$ in the standard decay channel. The advantage of this scenario is that it can generate naturally the observed baryon asymmetry of the universe, even for right-handed neutrino masses in 10 TeV region, without requiring neutrinos to be degenerate.
| In-person participation | Yes |
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