Measurement of the Top Quark Pair Production Cross Section in pbarp Collisions

TL;DR

This paper reports a measurement of the top quark pair production cross section in proton-antiproton collisions at 1.8 TeV using data from the D0 experiment, providing insights into top quark production rates.

Contribution

First measurement of the ttbar production cross section at 1.8 TeV using D0 data, with detailed analysis of decay channels and background estimation.

Findings

Measured cross section: 5.5 ± 1.8 pb

Observed 39 ttbar candidate events

Expected background: 13.7 ± 2.2 events

Abstract

We present a measurement of the ttbar production cross section in ppbar collisions at root(s) = 1.8TeV by the D0 experiment at the Fermilab Tevatron. The measurement is based on data from an integrated luminosity of approximately 125 pb^-1 accumulated during the 1992-1996 collider run. We observe 39 ttbar candidate events in the dilepton and lepton+jets decay channels with an expected background of 13.7+-2.2 events. For a top quark mass of 173.3GeV/c^2, we measure the ttbar production cross section to be 5.5+-1.8 pb.