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

, The ATLAS collaboration (2016) Measurement of the charge asymmetry in top-quark pair production in the lepton-plus-jets final state in pp collision data at √s=8TeV with the ATLAS detector. European Physical Journal C: Particles and Fields, 76 (2). ISSN 1434-6044

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Abstract

This paper reports inclusive and differential measurements of the tt¯ charge asymmetry AC in 20.3 fb−1 of √s=8 TeV 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.

Item Type:
Journal Article
Journal or Publication Title:
European Physical Journal C: Particles and Fields
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2201
Subjects:
ID Code:
84561
Deposited By:
Deposited On:
06 Feb 2017 11:14
Refereed?:
Yes
Published?:
Published
Last Modified:
24 Nov 2020 05:00