From the Early Universe to Colliders: Low-Scale Leptogenesis

by Yannis Georis (Université catholique de Louvain (UCLouvain))

Monday Jun 23, 2025, 4:15 PM → 5:45 PM Europe/Berlin

D6-135 (UHG)

Extending the Standard Model with right-handed neutrinos (RHNs) provides a minimal explanation for the origin of neutrino masses, via the type-I seesaw mechanism, and for the observed matter-antimatter asymmetry through leptogenesis. An especially appealing possibility would be for the RHN masses to lie below the TeV scale, making them accessible to present-day experiments. In this talk, I will review how the properties of RHNs are constrained by the joint requirements of reproducing the neutrino masses and mixings and generating the baryon asymmetry. In particular, I will discuss how the testability of the model changes when moving from the minimal scenario with 2 RHNs to one with 3 generations. Moreover, I will examine the effects of flavour and CP symmetries on the model's parameter space.

2025-06-23_Georis_Yannis.pdf