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Measurement of the Differential Cross Section dσ/d(cos⁡θ[subscript t]) for Top-Quark Pair Production in p[bar over p] Collisions at √s = 1.96  TeV

Author(s)
Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Paus, Christoph M. E.
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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].
Date issued
2013-10
URI
http://hdl.handle.net/1721.1/84932
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
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(cos⁡θ[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
Version: Final published version
ISSN
0031-9007
1079-7114

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