Measurement of the charge asymmetry in dileptonic decays of top quark pairs in pp collisions at √s = 7 TeV using the ATLAS detector

Open Access
Authors
  • G. Aad
  • [Unknown] et al.
  • R. Aben
  • I. Angelozzi
Publication date 05-2015
Journal The Journal of High Energy Physics
Article number 61
Volume | Issue number 2015 | 5
Number of pages 49
Organisations
  • Faculty of Science (FNWI) - Institute of Physics (IoP) - Institute for High Energy Physics (IHEF)
Abstract
A measurement of the top-antitop (tt¯) charge asymmetry is presented using data corresponding to an integrated luminosity of 4.6 fb−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: ACℓℓ based on the identified charged leptons, and Att¯C, based on the reconstructed tt final state. The asymmetries are measured to be
AℓℓC=0.024±0.015(stat.)±0.009(syst.),
Att¯C=0.021±0.025(stat.)±0.017(syst.).
The measured values are in agreement with the Standard Model predictions.
Document type Article
Note ATLAS Collaboration
Language English
Published at https://doi.org/10.1007/JHEP05(2015)061
Published at http://dx.doi.org/10.1007/JHEP05(2015)061
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