Implications

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

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Supersymmetry Breaking

Supersymmetry in the equation for the MSSM Lagrangian is an exact symmetry. This implies the mass degeneration for the components of each supermultiplet. Anyway, if the superparticles had the same masses of the respective particles, they would have already been observed and the Supersymmetry should therefore be broken. Although it is widely believed that a … Continue reading Supersymmetry Breaking

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