Top-quark charge asymmetry at the LHC and Tevatron through NNLO QCD and NLO EW

Abstract : We provide the most up-to-date predictions for the top-quark charge asymmetry AC at the LHC with a center-of-mass energy of 8 TeV. Our result is accurate at the NNLO level in the strong interactions and at the complete-NLO level in both the strong and electroweak interactions. We present results for the inclusive AC, several differential asymmetries as well as the pT,tt¯ and mtt¯ cumulative asymmetries. Similarly to the Tevatron forward-backward asymmetry AFB, both NNLO QCD and NLO EW corrections to AC are found to be significant. The inclusion of higher-order corrections reduces the residual scale dependence in the predicted AC. The pattern of higher-order corrections indicates good perturbative control over these observables. We conclude that at present there is nearly uniform agreement between standard model predictions and LHC measurements across all AC-related observables. All previously published differential AFB predictions at the Tevatron are updated to the same accuracy.
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Soumis le : mardi 10 juillet 2018 - 03:25:10
Dernière modification le : vendredi 16 novembre 2018 - 02:06:22

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Michal Czakon, David Heymes, Alexander Mitov, Davide Pagani, Ioannis Tsinikos, et al.. Top-quark charge asymmetry at the LHC and Tevatron through NNLO QCD and NLO EW. Phys.Rev.D, 2018, 98 (1), pp.014003. 〈10.1103/PhysRevD.98.014003〉. 〈hal-01833810〉



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