Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2010-04-19
Phys.Rev.Lett.105:012001,2010
Physics
High Energy Physics
High Energy Physics - Experiment
7 pages, 2 figures, 1 table
Scientific paper
10.1103/PhysRevLett.105.012001
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.
Aaltonen Timo
CDF Collaboration
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