Abstract. The observation of neutrino oscillations requires an extension of the Standard Model that generates neutrino masses and mixing. One of the simplest possibility is the addition of right-handed neutrinos, naturally leading to seesaw mechanisms. Low-scale realisations of this idea are phenomenologically appealing, since they could be tested in both collider and low-energy experiments. We will first prove that in the limit of massless light neutrinos, all these models conserve lepton number. In a second part, I will discuss how studies of the triple Higgs coupling can be used to probe neutrino mass models in a regime otherwise difficult to access.
(The slides will be available here)