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We present a measurement of the top quark pair production cross section inppbar collisions at sqrt(s)=1.96 TeV utilizing 425 pb-1 of data collected withthe D0 detector at the Fermilab Tevatron Collider. We consider the final stateof the top quark pair containing one high-pT electron or muon and at least fourjets. We exploit specific kinematic features of ttbar events to extract thecross section. For a top quark mass of 175 GeV, we measure sigma_ttbar = 6.4+1.3-1.2(stat} +/- 0.7(syst)+/- 0.4(lum) pb in good agreement with the standardmodel prediction.

Measurement of the ttbar production cross section in ppbar collisions at sqrt{s} = 1.96 TeV using kinematic characteristics of lepton + jets events