In this thesis, the running of neutrino masses, lepton mixing angles and CP phases is investigated, using the description of neutrino masses by the lowest dimensional effective operator and its realization within see-saw scenarios. In the effective approach, the beta-functions which govern the running of the parameters below the lowest see-saw scale in the Standard Model, in Two-Higgs-Doublet Models and in the Minimal Supersymmetric Standard Model are calculated. Analytical formulae, which allow to understand the running qualitatively and to a good approximation also quantitatively, are derived and compared to numerical results. In minimal see-saw scenarios, where only heavy singlets are added to the particle spectrum, the beta-functions and matching conditions for the various effective theories, which arise from successively integrating out the heavy particles, are calculated in the above-named models. Characteristic properties of the running in these scenarios are discussed analytically and illustrated by numerical examples.
«
In this thesis, the running of neutrino masses, lepton mixing angles and CP phases is investigated, using the description of neutrino masses by the lowest dimensional effective operator and its realization within see-saw scenarios. In the effective approach, the beta-functions which govern the running of the parameters below the lowest see-saw scale in the Standard Model, in Two-Higgs-Doublet Models and in the Minimal Supersymmetric Standard Model are calculated. Analytical formulae, which allow...
»