Search for high mass top quark production in pp̅ collisions at √s=1.8 TeV

Abstract

We present new results on the search for the top quark in pp̅ collisions at √s=1.8 TeV with an integrated luminosity of 13.5±1.6 pb^–1. We have considered tt̅ production in the standard model using electron and muon dilepton decay channels ( tt̅→eμ+jets, ee+jets, and μμ+jets) and single-lepton decay channels (tt̅→e+jets and μ+jets) with and without tagging of b quark jets. From all channels we have nine events with an expected background of 3.8±0.9. If we assume that the excess is due to tt̅ production, and assume a top mass of 180 GeV/c², we obtain a cross section of 8.2±5.1 pb.