Theory seminar: Yannis Georis, "Recent developments in testable leptogenesis"

Thursday 23 Nov 2023, 16:00 → 17:00 Europe/Amsterdam

Veltman centre

Extending the Standard Model (SM) with right-handed neutrinos (RHN) provides a minimal explanation for both the origin of the SM neutrino masses through the type-I seesaw and of the present imbalance between matter and antimatter in our universe through leptogenesis. Even though the mass of these RHNs is in principle unbounded from above, an attractive possibility would be for the RHN masses to lie at a relatively low scale, i.e. MeV to TeV, such that these new particles can be searched for at present-day experiments.  In this talk, I will review some of the latest developments in the field of low-scale leptogenesis. In particular, I will discuss how the testability of the model changes compared to the minimal case with 2 RHNs when one considers a scenario with 3 RHN generations instead. Moreover, I will look into the effects of flavour and CP symmetries on the parameter space of the model.

Slides_Nikhef_Seminar.pdf