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Measurement of the Ratio σttZ/γ∗→ll and Precise Extraction of the tt Cross Section

CollaborationWith : Clark, Allan Geoffrey / Garcia Navarro, Jose Enrique / Lister, Alison / Wu, Xin
Published in Physical Review Letters. 2010, vol. 105, p. 7p.
Abstract We report a measurement of the ratio of the tt to Z/γ∗ production cross sections in √s=1.96  TeV pp¯ collisions using data corresponding to an integrated luminosity of up to 4.6  fb−1, collected by the CDF II detector. The tt 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/γ∗→ll cross section predicted by the standard model, the extracted tt cross sections are effectively insensitive to the uncertainty on luminosity. A best linear unbiased estimate is used to combine both measurements with the result σtt¯=7.70±0.52  pb, for a top-quark mass of 172.5  GeV/c2.
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CDF COLLABORATION. Measurement of the Ratio σttZ/γ∗→ll and Precise Extraction of the tt Cross Section. In: Physical Review Letters, 2010, vol. 105, p. 7p. doi: 10.1103/PhysRevLett.105.012001 https://archive-ouverte.unige.ch/unige:38692

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Deposited on : 2014-07-15

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