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

Abstract : Measurements of the top--antitop quark pair production charge asymmetry in the dilepton channel are presented using data corresponding to an integrated luminosity of 20.3 fb−1 from pp collisions at a center-of-mass energy of 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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-01304651
Contributor : Claudine Bombar <>
Submitted on : Wednesday, April 20, 2016 - 9:57:56 AM
Last modification on : Thursday, November 26, 2020 - 3:39:06 PM

### Citation

G. Aad, Z. Barnovska, N. Berger, M. Delmastro, L. Di Ciaccio, et al.. Measurements of the charge asymmetry in top-quark pair production in the dilepton final state at s√=8 TeV with the ATLAS detector. Physical Review D, American Physical Society, 2016, 94, pp.032006 ⟨10.1103/PhysRevD.94.032006⟩. ⟨in2p3-01304651⟩

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