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.
Top-quark charge asymmetry at the LHC and Tevatron through NNLO QCD and NLO EW / M. Czakon, D. Heymes, A. Mitov, D. Pagani, I. Tsinikos, M. Zaro. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 98:1(2018 Jul 05). [10.1103/PhysRevD.98.014003]
Top-quark charge asymmetry at the LHC and Tevatron through NNLO QCD and NLO EW
D. Pagani;M. Zaro
2018
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.File | Dimensione | Formato | |
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