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Combination of inclusive and differential t(t)over-bar charge asymmetry measurements using ATLAS and CMS data at root S =7 and 8 TeV

Published version
Peer-reviewed

Type

Article

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Authors

Aaboud, MY 
Aad, G 
Abbott, B 
Abdinov, O 
Abeloos, B 

Abstract

This paper presents combinations of inclusive and differential measurements of the charge asymmetry (AC) in top quark pair (tt¯) events with a lepton+jets signature by the ATLAS and CMS Collaborations, using data from LHC proton-proton collisions at centre-of-mass energies of 7 and 8 TeV. The data correspond to integrated luminosities of about 5 and 20 fb−1 for each experiment, respectively. The resulting combined LHC measurements of the inclusive charge asymmetry are ACCHC7 = 0.005 ± 0.007 (stat) ± 0.006(syst) at 7 TeV and ACCHC8 = 0.0055 ± 0.0023 (stat) ± 0.0025 (syst) at 8 TeV. These values, as well as the combination of AC measurements as a function of the invariant mass of the tt¯ system at 8 TeV, are consistent with the respective standard model predictions.

Description

Keywords

Hadron-Hadron scattering (experiments), Top physics

Journal Title

Journal of High Energy Physics

Conference Name

Journal ISSN

1029-8479
1029-8479

Volume Title

Publisher

Springer
Sponsorship
Science and Technology Facilities Council (ST/I005846/1)
Science and Technology Facilities Council (ST/J00488X/1)
Science and Technology Facilities Council (ST/K003666/1)
Science and Technology Facilities Council (ST/L005662/1)
Science and Technology Facilities Council (ST/M006417/1)
Science and Technology Facilities Council (ST/H001093/1)
Science and Technology Facilities Council (ST/H001093/2)
Science and Technology Facilities Council (ST/K00073X/1)
Science and Technology Facilities Council (PP/E000347/1)
Science and Technology Facilities Council (ST/K001361/1)
Science and Technology Facilities Council (ST/M503423/1)
Science and Technology Facilities Council (ST/N50399X/1)
Science and Technology Facilities Council (ST/N000234/1)
Science and Technology Facilities Council (ST/R504671/1)