Speaker
Description
The present Baryon Asymmetry of the Universe (BAU) can be explained in the framework of the type-I seesaw mechanism for neutrino mass generation through leptogenesis (LG). The L-, C- and CP-violating processes involving the right-handed neutrinos can generate an early lepton asymmetry, which is later converted into the present BAU by sphalerons. Remarkably, all the necessary CP-violation necessary to explain the present BAU via LG can originate uniquely from the Dirac phase of the neutrino mixing matrix, thus providing a direct link to CP-violation in low-energy neutrino oscillations. I will review the state-of-the-art understanding of the LG mechanism and concentrate on the scenarios with low-energy Dirac CP-violation with either 2 or 3 right-handed neutrinos. Possibilities to test the discussed scenarios at low-energy neutrino experiments, at heavy neutral lepton searches and experiments looking at lepton flavour violation will also be presented.
