Measurement of the ttbar Production Cross Section in ppbar Collisions at sqrt(s)=1.96 TeV in Dilepton Final States

TL;DR

This paper reports a measurement of the top quark pair production cross section in proton-antiproton collisions at 1.96 TeV using dilepton final states, confirming consistency with the standard model predictions.

Contribution

First measurement of ttbar production cross section in dilepton channels at Tevatron with 230 pb-1 of data, using the DO detector.

Findings

Measured cross section: 8.6 pb with uncertainties

Results agree with standard model predictions

Analysis based on kinematic properties of dilepton events

Abstract

We present a measurement of the top quark pair (ttbar) production cross section in ppbar collisions at a center-of-mass energy of 1.96 TeV using 230 pb-1 of data collected by the DO detector at the Fermilab Tevatron Collider. We select events in the dilepton final states ee, emu and mumu based on kinematical properties consistent with ttbar events. For a top quark mass of 175 GeV, we measure a top pair production cross section sigma(ttbar) = 8.6 +3.2-2.7 (stat) +/-1.1 (syst) +/-0.6 (lumi) pb, in good agreement with the standard model prediction.