Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2004-11-02
Int.J.Mod.Phys.A20:3183,2005
Physics
High Energy Physics
High Energy Physics - Experiment
4 pages, 2 figures, Proceedings to DPF2004, Riverside, CA
Scientific paper
10.1142/S0217751X05026091
Measurements of the ttbar production cross-section at \sqrt{s} = 1.96TeV in proton-antiproton collisions were performed by the CDF and Dzero collaborations using ttbar final states where both W's decay hadronically. Each experiment uses luminosity of about 160pb^-1 of data collected during Run II of the Fermilab Tevatron collider. Beside kinematical observables both experiments take advantage of identifying b-jets based on lifetime tagging. While CDF counts the number of b-tags over background after a cut based analysis, Dzero counts the excess of events after a neural network based kinematical selection and requiring a b-tagged jet. CDF obtains $\sigma_{ttbar}=7.8+-2.5{stat}^{+4.7}_{-2.3}{syst}; Dzero $\sigma_{ttbar}=7.7^{+3.4}_{-3.3}{stat}^{+4.7}_{-3.8}{syst}+-0.5{lumi}.
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