Measurement of the Ratio sigmatt[over-bar] /sigmaZ/gamma*-->ll and Precise Extraction of the tt[over-bar] Cross Section
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Aaltonen-2010-Measurement of the R.pdf
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Author(s)
Paus, Christoph M. E.
Goncharov, Maxim
Gomez-Ceballos, Guillelmo
Makhoul, Khaldoun
Bauer, Gerry P
Alternative Title
Measurement of the Ratio σtt̅ /σZ/γ*→ll and Precise Extraction of the tt̅ Cross Section
Date Issued
June 2010
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
CDF Collaboration et al. “Measurement of the Ratio sigma _{tt[over -bar]}/ sigma _{Z/ gamma^{*}-->ll} and Precise Extraction of the tt[over -bar] Cross Section.” Physical Review Letters 105.1 (2010): 012001. © 2010 The American Physical Society.
Version
Final published version
Abstract
We report a measurement of the ratio of the tt[over-bar] to Z/gamma* production cross sections in [sqrt]s=1.96 TeV pp[over-bar] collisions using data corresponding to an integrated luminosity of up to 4.6 fb[superscript -1], collected by the CDF II detector. The tt[over-bar] 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 predicted by the standard model, the extracted tt[over-bar] cross sections are effectively insensitive to the uncertainty on luminosity. A best linear unbiased estimate is used to combine both measurements with the result sigmatt[over-bar] =7.70±0.52 pb, for a top-quark mass of 172.5 GeV/c[superscript 2].
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.105.012001
