Measurement of the ttbar Production Cross Section in ppbar collisions at sqrt s = 1.96 TeV in the All Hadronic Decay Mode

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 the all-hadronic decay mode with jet and b-tagging techniques.

Contribution

First measurement of ttbar production cross section in the all-hadronic decay channel at the Tevatron with detailed event selection and b-jet identification.

Findings

Measured cross section: 7.5 pb with uncertainties.

Result consistent with Standard Model predictions.

Used 311 pb^-1 of data from the CDF-II detector.

Abstract

We report a measurement of the ttbar production cross section using the CDF-II detector at the Fermilab Tevatron. The analysis is performed using 311 pb-1 of ppbar collisions at sqrt(s)=1.96 TeV. The data consist of events selected with six or more hadronic jets with additional kinematic requirements. At least one of these jets must be identified as a b-quark jet by the reconstruction of a secondary vertex. The cross section is measured to be sigma(tbart)=7.5+-2.1(stat.)+3.3-2.2(syst.)+0.5-0.4(lumi.) pb, which is consistent with the standard model prediction.