Top quark cross section measurements with CMS

Measurements of the inclusive top quark pair production cross section at 7 TeV and 8 TeV are presented, based on CMS data collected in 2011 and 2012. The total cross section is measured in the lepton+jets, dilepton and fully hadronic channels, including the tau-dilepton and tau+jets modes. Indirect constraints on both the top quark mass and $\alpha_{s}$ are obtained through their relation to the inclusive cross section. First measurements of top quark pair production with additional b-quarks in the final state are also presented. Differential cross sections are measured as functions of various kinematic observables, including the transverse momentum and rapidity of the (anti)top quark and the top-antitop system and the jets and leptons of the event final state. Multiplicity and kinematic distributions of the jets produced in addition to the top-quark pair are also investigated. The results are combined and confronted with precise theory calculations.