Beyond the Standard Model

Abstract

As of today, the Standard Model has passed all tests and no significant hint of any physics beyond this model has been found. On the other hand, being the most general renormalizable theory (if the minimal Higgs sector is included) with the desired particle spectrum and the observed interactions, it is mainly parametrizing our ignorance about physics at higher scales. This parametrization requires 27 parameters, of which only three (the gauge couplings) are generically related to its gauge theory structure. All other parameters originate from the symmetry-breaking sector. We have as a possible set of parameters the electroweak vacuum-expectation value, the Higgs mass, six quark masses and six lepton masses, three mixing angles in the quark sector and another three for the leptons, and four CP-violating phases, of which three originate from the lepton sector, assuming Majorana neutrinos.