Measurement of the charge asymmetry in top quark pair production in pp collisions at sqrt(s) = 8 TeV using a template method

Abstract

The charge asymmetry in the production of top quark and antiquark pairs is measured in proton-proton collisions at a center-of-mass energy of 8 TeV. The data, corresponding to an integrated luminosity of 19.6 inverse femtobarns, were collected by the CMS experiment at the LHC. Events with a single isolated electron or muon, and four or more jets, at least one of which is likely to have originated from hadronization of a bottom quark, are selected. A template technique is used to measure the asymmetry in the distribution of differences in the top quark and antiquark absolute rapidities. The measured asymmetry is A[c,y] = [0.33 +/- 0.26 (stat) +/- 0.33 (syst)]%, which is the most precise result to date. The results are compared to calculations based on the standard model and on several beyond-the-standard-model scenarios.

Replaced with the published version. All of the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/TOP-13-013/index.html (CMS Public Pages)

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• Top-Quark Physics: Status and Prospects
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• Top-quark physics at the Large Hadron Collider
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• Constraints on four-fermion interactions from the $t\bar{t}$ charge asymmetry at hadron colliders
• Extrapolation Technique Pitfalls in Asymmetry Measurements at Colliders
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