Speaker
Drona Vatsyayan
Description
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-zerovacuum 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.
