Measurement of the Differential Cross Section dσ/d(cosθ[subscript t]) for Top-Quark Pair Production in p[bar over p] Collisions at √s = 1.96 TeV
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Aaltonen-2013-Measurement of the differential.pdf
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Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Paus, Christoph M. E.
Date Issued
October 2013
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaltonen, T., S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, G. Apollinari, et al. “Measurement of the Differential Cross Section dσ/d(cosθ[subscript t]) for Top-Quark Pair Production in p[bar over p] Collisions at √s = 1.96 TeV.” Physical Review Letters 111, no. 18 (October 2013). © 2013 American Physical Society
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Final published version
Abstract
We report a measurement of the differential cross section dσ/d(cosθ[subscript t]) for top-quark pair production as a function of the top-quark production angle in proton-antiproton collisions at s√ = 1.96 TeV. This measurement is performed using data collected with the CDF II detector at the Tevatron, corresponding to an integrated luminosity of 9.4 fb[superscript −1]. We employ the Legendre polynomials to characterize the shape of the differential cross section at the parton level. The observed Legendre coefficients are in good agreement with the prediction of the next-to-leading-order standard-model calculation, with the exception of an excess linear-term coefficient a[subscript 1] = 0.40 ± 0.12, compared to the standard-model prediction of a[subscript 1] = 0.15[+0.07 over −0.03].
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.111.182002
