Measurement of the ttbar production cross section in ppbar collisions at sqrt{s} = 1.96 TeV

TL;DR

This paper reports a measurement of the top-antitop quark pair production cross section in proton-antiproton collisions at 1.96 TeV, using data from the D0 detector, employing b-tagging and kinematic discriminants.

Contribution

It presents a new measurement of the ttbar production cross section at Tevatron energies with two complementary analysis methods, providing insights into top quark properties.

Findings

Measured sigma_ttbar=7.62+/-0.85 pb

Estimated top quark mass as 170+/-7 GeV

Validated theoretical predictions with experimental data

Abstract

We measure the ttbar production cross section in ppbar collisions at sqrt{s}=1.96 TeV in the lepton+jets channel. Two complementary methods discriminate between signal and background, b-tagging and a kinematic likelihood discriminant. Based on 0.9 fb-1 of data collected by the D0 detector at the Fermilab Tevatron Collider, we measure sigma_ttbar=7.62+/-0.85 pb, assuming the current world average m_t=172.6 GeV. We compare our cross section measurement with theory predictions to determine a value for the top quark mass of 170+/-7 GeV.