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 pp¯ collisions at √s = 1.8 TeV with an integrated luminosity of 13.5± 1.6 pb^-1. We have considered tt¯ production in the standard model using electron and muon dilepton decay channels ( tt¯ → eμ + jets, ee+ jets, and μ μ + jets) and single-lepton decay channels ( tt¯ →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 tt¯ production, and assume a top mass of 180 GeV/ c², we obtain a cross section of 8.2±5.1 pb.