Vytautas Dūdėnas (Vilnus University)

Neutrinos in the Grimus-Neufeld model

The Grimus-Neufeld model is a two Higgs doublet model, extended with a single heavy seesaw neutrino. This setup allows for explaining both of the neutrino mass differences with the seesaw mechanism and radiative mass generation. Since this model is rather minimal, the neutrino Yukawa couplings have only few parameters. Connecting radiative mass generation with the seesaw mechanism, almost all of the neutrino Yukawa couplings can be expressed in terms of the neutrino mixing matrix and the neutrino masses. These Yukawa couplings contribute to physical observables, such as lepton flavor violation. I will introduce to the model by going through the two mass generation mechanisms and show how we can relate the neutrino Yukawa couplings to measured neutrino parameters at one loop.