Fields, masses and coupling constants appearing in the Lagrangian are perturbatively divergent quantities which become acceptable by renormalization procedures. As a consequence, the new quantities are function of the energy and the functional dependence is governed by the Renormalization Group Equations (RGE). For the gauge coupling constants these equations have the form where is the Callan-Symanzik … Continue reading Implications



Supersymmetry (SUSY) is one of the most compelling possible extensions of the Standard Model of particle physics, and one of the most promising theory candidate for a new principle about Nature that could be discovered at high-energy colliders such as the . The hierarchy problem represents the only indicator of the energy scale in which … Continue reading Supersymmetry

Beyond the Standard Model

After the discovery of a Higgs boson, all the particles included in the SM have been experimentally observed. Despite its extraordinary phenomenological success, the SM is considered an incomplete theory. It manifests some theoretical underlying problems which suggest the need for a "deeper" theory of which the Standard Model could be just an effectual theory. Furthermore, … Continue reading Beyond the Standard Model