Measurement of the charge asymmetry in dileptonic decays of top quark pairs in pp collisions at √s = 7 TeV using the ATLAS detector
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Aad-2015-Measurement of the c.pdf
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Author(s)
Taylor, Frank E.
Date Issued
May 2015
Journal
Journal of High Energy Physics
Publisher
Springer-Verlag
Citation
Aad, G., B. Abbott, J. Abdallah, S. Abdel Khalek, O. Abdinov, R. Aben, B. Abi, et al. “Measurement of the Charge Asymmetry in Dileptonic Decays of Top Quark Pairs in pp Collisions at √s = 7 TeV Using the ATLAS Detector.” J. High Energ. Phys. 2015, no. 5 (May 2015). © 2015 CERN, for the benefit of the ATLAS Collaboration
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Final published version
Abstract
A measurement of the top-antitop (t[bar over t]) charge asymmetry is presented using data corresponding to an integrated luminosity of 4.6 fb[superscript −1] of LHC pp collisions at a centreof-mass energy of 7 TeV collected by the ATLAS detector. Events with two charged leptons, at least two jets and large missing transverse momentum are selected. Two observables are studied: A [ℓℓ over C] based on the identified charged leptons, and A[t[bar over t] over C], based on the reconstructed tt final state. The asymmetries are measured to be
A[ℓℓ over C] = 0.024 ± 0.015(stat.) ± 0.009(syst.),
A[t[bar over t] over C] = 0.021 ± 0.025(stat.) ± 0.017(syst.).
The measured values are in agreement with the Standard Model predictions.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1007/jhep05(2015)061
