Publication Date:
2018-04-01
Description:
This paper presents combinations of inclusive and differential measurements of the charge asymmetry (A C) in top quark pair $$ left(mathrm{t}overline{mathrm{t}}
ight) $$ t t ĀÆ 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 fbā1 for each experiment, respectively. The resulting combined LHC measurements of the inclusive charge asymmetry are A C CHC7 ā=ā0.005āĀ±Ā 0.007Ā (stat)āĀ±Ā 0.006(syst) at 7 TeV and A C CHC8 ā=ā0.0055āĀ±ā0.0023ā(stat)āĀ±ā0.0025ā(syst) at 8 TeV. These values, as well as the combination of A C measurements as a function of the invariant mass of the $$ mathrm{t}overline{mathrm{t}} $$ t t ĀÆ system at 8 TeV, are consistent with the respective standard model predictions.
Print ISSN:
1126-6708
Electronic ISSN:
1029-8479
Topics:
Physics
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