Combination of inclusive and differential $$ \mathrm{t}\overline{\mathrm{t}} $$ charge asymmetry measurements using ATLAS and CMS data at $$ \sqrt{s}=7 $$ and 8 TeV
M. Aaboud (Faculté des Sciences, Université Mohamed Premier and LPTPM, Oujda, Morocco); G. Aad (CPPM, Aix-Marseille Université and CNRS/IN2P3, Marseille, France); B. Abbott (Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK, United States of America); O. Abdinov (Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan); B. Abeloos (LAL, Univ. Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay, France); et al - Show all 5098 authors
This paper presents combinations of inclusive and differential measurements of the charge asymmetry (A C) in top quark pair $$ \left(\mathrm{t}\overline{\mathrm{t}}\right) $$ 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 A CCHC7 = 0.005 ± 0.007 (stat) ± 0.006(syst) at 7 TeV and A CCHC8 = 0.0055 ± 0.0023 (stat) ± 0.0025 (syst) at 8 TeV. These values, as well as the combination of A C measurements as a function of the invariant mass of the $$ \mathrm{t}\overline{\mathrm{t}} $$ system at 8 TeV, are consistent with the respective standard model predictions.