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
This paper reports inclusive and differential measurements of the t[bar over t] charge asymmetry A[subscript C] in 20.3 fb[superscript −1] of s√= 8 TeVs pp collisions recorded by the ATLAS experiment at the Large Hadron Collider at CERN. Three differential measurements are performed as a functio...
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| Format: | Article |
| Language: | en_US |
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Springer-Verlag
2017
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| Online Access: | http://hdl.handle.net/1721.1/106553 https://orcid.org/0000-0002-7586-7253 |
| Summary: | This paper reports inclusive and differential measurements of the t[bar over t] charge asymmetry A[subscript C] in 20.3 fb[superscript −1] of s√= 8 TeVs 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 t[bar over t] system. The t[bar over t] 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 t[bar over t] event kinematics. A Bayesian unfolding procedure is performed to infer the asymmetry at parton level from the observed data distribution. The inclusive t[bar over t] 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. |
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