Speaker
Description
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 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 also look into the effects of flavour and CP symmetries on the parameter space of the model.
Based on arXiv:2106.16226, arXiv:2203.08538 and other upcoming works
