Looking for top partners at the LHC

Full text: The possibility of finding new physics at the TeV scale at the LHC, has been reinforced by the recent announcement of the discovery of a scalar boson that could be the Higgs boson predicted by the Standard Model of the elementary particles (SM). Thus, at present the search for new phenomena involving new particles becomes very exciting. Among the many particles candidates for new physics, there are non-SM quarks that carry 2/3 units of electric charge, commonly called top partners, predicted in some extensions of the Standard Model (SM). Thus, in this work we study the production and signals of these top partners, within the LHC energy regime. We consider some particular cases of these quarks, such as those predicted in the sequential SM, the 331 model version with right-handed neutrinos (331RHN), vector-like quarks models and a new model with chiral exotic quarks . Given the different origins of these quarks, we expect different signals in the final states distributions, that can be useful for the discovery, and discrimination among the considered models. Taking into account the luminosity already reached by the LHC, and the expected for 14 TeV, we hope a clear signal and a great number of events for these new particles. (author)