Abstract
Abstract
We analyse a model that connects the neutrino sector and the dark sector of the universe via a mediator Φ, stabilised by a discrete 𝒵
4 symmetry that breaks to a remnant 𝒵
2 upon Φ acquiring a non-zero
vacuum expectation value (vϕ
). The model accounts for the observed baryon asymmetry of the universe via additional contributions to the canonical Type-I leptogenesis. The 𝒵
4 symmetry breaking scale (vϕ
) in the model not only establishes a connection between the neutrino sector and the dark sector, but could also lead to gravitational wave signals that are within the reach of current and future experimental sensitivities.