Setor eletrofraco: estruturas e invariância de calibre no modelo padrão

Abstract

The electroweak sector of the Standard Model of Particle Physics is an example of a theory which is widely tested in an variety of energy scales, and its theorical formulation included the existence of particles that we know nowadays, such as the Higgs boson and the weak bosons. The model describes particle field dynamics through lagrangian densities and predicts the existence of particle coupling through interaction terms. This work describes the electroweak sector in the Standard Model, firstly discussing about its formalism and the theory constituints, and after this, introducing Spontaneous Symmetry Breaking process. At last, the left-handed lepton symmetry group is introduced, an then how the Higgs Mechanism gives mass to some of the constituints.