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Combination of inclusive and differential t¯t charge asymmetry measurements using ATLAS and CMS data at √s = 7 and 8 TeV
Journal article   Open access   Peer reviewed

Combination of inclusive and differential t¯t charge asymmetry measurements using ATLAS and CMS data at √s = 7 and 8 TeV

Yiming Abulaiti, Gabriele Bertoli, Olga Bessidskaia Bylund, Christian Bohm, Rebecca M. D. Carney, Christophe Clément, Karl Gellerstedt, Sten Hellman, Kerstin Jon-And, David A. Milstead, …
The journal of high energy physics, Vol.2018(4), 33
04/09/2018
DOI: 10.1007/JHEP04(2018)033
url
https://doi.org/10.1007/JHEP04(2018)033View
Published (Version of record) Open Access

Abstract

This paper presents combinations of inclusive and differential measurements of the charge asymmetry (A(C)) in top quark pair (t(t)over-bar) 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(C)(LHC7) = 0.005 +/- 0.007 (stat) +/- 0.006 (syst) at 7 TeV and A(C)(LHC8) = 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 t(t)over-bar system at 8 TeV, are consistent with the respective standard model predictions.
 Natural Sciences Physical Sciences Fysik Hadron-Hadron scattering (experiments) Naturvetenskap Top physics

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