Speaker
Description
The standard model is one of the most successful theories at describing the strong, weak, and electromagnetic forces and the interactions between the elementary particles. The scalar boson discovered in 2012 at the Large Hadron Collider (LHC) might be consistent with the Higgs boson predicted by the standard model, thus further validating this theoretical framework. However, the experimental data still leave plenty of room to determine whether or not an extension of the scalar sector is allowed. The standard model fails to explain physical phenomena in nature, such as the presence of dark matter, the observed matter-antimatter asymmetry, the existence of massive neutrinos etc. In this respect, an extension of the scalar sector would somewhat account for phenomena not yet explained. The Two-Higgs-Doublet-Model (2HDM) is one of the simplest extensions of the Higgs sector in the Standard model. It is theoretically built by adding a second doublet to the scalar sector, thus giving rise to three neutral and two charged Higgs bosons. With data collected at the LHC at sqrt(s)=13TeV and L=35.9/fb, a search for a CP-even Higgs boson decaying to a lighter CP-odd Higgs boson (then decaying to bb) and a Z boson (then decaying to l+l-) is performed at CMS. The search is carried out under the assumption of classical or twisted custodial symmetry and the hypothesis of Type II Yukawa couplings.
