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Scientific article
Open access
English

Measurement of the charge asymmetry in top-quark pair production in the lepton-plus-jets final state in pp collision data at √s = 8 TeV with the ATLAS detector

ContributorsATLAS Collaboration
Collection
  • Open Access - SCOAP3
Publication date2016
Abstract

This paper reports inclusive and differential measurements of the tt¯ charge asymmetry AC in 20.3fb-1 of s=8TeV pp collisions recorded by the ATLAS experiment at the Large Hadron Collider at CERN. Three differential measurements are performed as a function of the invariant mass, transverse momentum and longitudinal boost of the tt¯ system. The tt¯ pairs are selected in the single-lepton channels ( e or μ ) with at least four jets, and a likelihood fit is used to reconstruct the tt¯ event kinematics. A Bayesian unfolding procedure is performed to infer the asymmetry at parton level from the observed data distribution. The inclusive tt¯ charge asymmetry is measured to be AC=0.009±0.005 (stat. + syst.). The inclusive and differential measurements are compatible with the values predicted by the Standard Model.

Citation (ISO format)
ATLAS Collaboration. Measurement of the charge asymmetry in top-quark pair production in the lepton-plus-jets final state in pp collision data at √s = 8 TeV with the ATLAS detector. In: European physical journal. C, Particles and fields, 2016, vol. 76, n° 2, p. 87. doi: 10.1140/epjc/s10052-016-3910-6
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Article (Published version)
Identifiers
ISSN of the journal1434-6044
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