The top quark (t) is the most massive known fundamental particle in the standard model. It has a Yukawa coupling to the Higgs field that is near unity. It is also closely connected to the hierarchy problem, where the largest corrections to the Higgs mass arise from top quark loops. Furthermore, studies of the top quark may provide insight into the mechanism of electroweak(EW) symmetry breaking. Many theories beyond the standard model (SM) predict heavy resonances at the TeV scale, which would decay to top quark and antiquark (tt) pairs.
In this talk the search for the resonant ttbar production with the dataset collected with the CMS detector will be discussed. The analysis considers three exclusive final states and uses reconstruction techniques that are optimized for top quarks with high Lorentz boosts, which requires the use of nonisolated leptons and jet substructure techniques.
