The top-quark pair production cross section is measured in final states with one electron or muon and one hadronically decaying τlepton from the process tt→(ν)(τντ)bb, where =e, μ. The data sample corresponds to an integrated luminosity of 19.6fb−1collected with the CMS detector in proton–proton collisions at √s=8TeV. The measured cross section σtt=257 ±3(stat)±24(syst)±7(lumi)pb, assuming a top-quark mass of 172.5GeV, is consistent with the standard model prediction
