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: ACℓℓ based on the selected leptons and ACtt based on the reconstructed tt final state. The inclusive asymmetries are measured in the full phase space to be ACℓℓ=0.008±0.006 and ACtt=0.021±0.016, which are in agreement with the Standard Model predictions of ACℓℓ=0.0064±0.0003 and ACtt=0.0111±0.0004. © 2016 CERN.
Original language | English |
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Article number | 032006 |
Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
Volume | 94 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2016 |
Bibliographical note
Cited By :1Export Date: 13 July 2017
Subject classification (UKÄ)
- Subatomic Physics