ttbar production at CMS

Physics

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Scientific paper

With about 10 millions top-pair event per year at low luminosity, the LHC will effectively be a top-factory. This large amount of data will allow a very precise determination of the properties of the top quark. Studying top-pair total and differential cross-sections will allow important tests on perturbative QCD predictions and will help in the proton PDF constraining. Associated ttH production will be an important complementary discovery channel for the Higgs boson at low masses and will allow a direct measurement of the top Yukawa coupling. Moreover, the top sector is an excellent place where new physics could reveal itself, given the closeness of the top mass to the electroweak scale. The first studies in CMS concerning top-pair events’ selection, from trigger setup to full reconstruction analysis, will be presented. A brief review of the measurements connected to top-pair production at the LHC within the Standard Model (SM) and in non-SM scenarios will be given, with emphasis on the ones which have been studied in more details in CMS.

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