First Measurement of the Ratio sigma_(t-tbar) / sigma_(Z/γ*->ll) and Precise Extraction of the t-tbar Cross Section

Abstract

We report a measurement of the ratio of the top-antitop to Z/gamma* production cross sections in sqrt(s) = 1.96 TeV proton-antiproton collisions using data corresponding to an integrated luminosity of up to 4.6 fb-1, collected by the CDF II detector. The top-antitop cross section ratio is measured using two complementary methods, a b-jet tagging measurement and a topological approach. By multiplying the ratios by the well-known theoretical Z/gamma*->ll cross section, the extracted top-antitop cross sections are effectively insensitive to the uncertainty on luminosity. A best linear unbiased estimate is used to combine both measurements with the result sigma_(top-antitop) = 7.70 +/- 0.52 pb, for a top-quark mass of 172.5 GeV/c^2.

7 pages, 2 figures, 1 table

References in corpus (2)

• Implications of CTEQ global analysis for collider observables
• Heavy-quark pair production at two loops in QCD

Cited by in corpus (12)

• Top quark asymmetry from a non-Abelian horizontal symmetry
• Forward-backward asymmetry in top quark production from light colored scalars in SO(10) model
• Measurement of the top quark pair production cross section in the lepton+jets channel in proton-antiproton collisions at $\sqrt{s}$=1.96 TeV
• Two-Loop Leading Color Corrections to Heavy-Quark Pair Production in the Gluon Fusion Channel
• Tevatron Asymmetry of Tops in a W',Z' Model
• Measurement of ttbar Spin Correlation in ppbar Collisions Using the CDF II Detector at the Tevatron
• Top quark forward-backward asymmetry at Tevatron and its implications at the LHC
• Top quark mass measurement using the template method at CDF
• Direct Top-Quark Width Measurement CDF
• Measurement of the mass difference between $t$ and $\bar{t}$ quarks
• Evidence for a Mass Dependent Forward-Backward Asymmetry in Top Quark Pair Production
• Top quark and Electroweak measurements at the Tevatron