Measurement of the t-channel single top-quark production cross section in pp collisions at √s = 7 TeV with the ATLAS detector
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Aad-2012-Measurement of the t.pdf
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1.47 MB
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Author(s)
Taylor, Frank E.
Date Issued
October 2012
Journal
Physics Letters B
Publisher
Elsevier B.V.
Citation
Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, A.A. Abdelalim, A. Abdesselam, O. Abdinov, et al. “Measurement of the t-Channel Single Top-Quark Production Cross Section in Pp Collisions at √s = 7 TeV with the ATLAS Detector.” Physics Letters B 717, no. 4–5 (October 2012): 330–350.
Version
Final published version
Abstract
We report a measurement of the cross section of single top-quark production in the t -channel using 1.04 fb[superscript −1] of pp collision data at √s = 7 TeV recorded with the ATLAS detector at the LHC. Selected events feature one electron or muon, missing transverse momentum, and two or three jets, exactly one of them identified as originating from a b quark. The cross section is measured by fitting the distribution of a multivariate discriminant constructed with a neural network, yielding [formula] which is in good agreement with the prediction of the Standard Model. Using the ratio of the measured to the theoretically predicted cross section and assuming that the top-quark-related CKM matrix elements obey the relation |Vtb|>>|Vts|, |Vtd|, the coupling strength at the W -t -b vertex is determined to be . If it is assumed that |Vtb|[less than or equal to] 1 a lower limit of [formula] is obtained at the 95% confidence level.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1016/j.physletb.2012.09.031
