Measurements of the charge asymmetry in top-quark pair production in the dilepton final state at √s=8  TeV with the ATLAS detector. / The ATLAS Collaboration.

In: Physical Review D , Vol. 94, No. 3, 032006, 22.08.2016, p. 1-31.

Research output: Contribution to journalArticle

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  • The ATLAS Collaboration

Abstract

Measurements of the top-antitop quark pair production charge asymmetry in the dilepton channel, characterized by two high-pT leptons (electrons or muons), are presented using data corresponding to an integrated luminosity of 20.3  fb−1 from pp collisions at a center-of-mass energy s√=8  TeV collected with the ATLAS detector at the Large Hadron Collider at CERN. Inclusive and differential measurements as a function of the invariant mass, transverse momentum, and longitudinal boost of the tt¯ system are performed both in the full phase space and in a fiducial phase space closely matching the detector acceptance. Two observables are studied: AℓℓC based on the selected leptons and Att¯C based on the reconstructed tt¯ final state. The inclusive asymmetries are measured in the full phase space to be AℓℓC=0.008±0.006 and Att¯C=0.021±0.016, which are in agreement with the Standard Model predictions of AℓℓC=0.0064±0.0003 and Att¯C=0.0111±0.0004.
Original languageEnglish
Article number032006
Pages (from-to)1-31
Number of pages31
JournalPhysical Review D
Volume94
Issue number3
DOIs
Publication statusPublished - 22 Aug 2016
This open access research output is licenced under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

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