• Open Access

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

Michał Czakon, David Heymes, Alexander Mitov, Davide Pagani, Ioannis Tsinikos, and Marco Zaro
Phys. Rev. D 98, 014003 – Published 5 July 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.

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  • Received 22 November 2017

DOI:https://doi.org/10.1103/PhysRevD.98.014003

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Particles & Fields

Authors & Affiliations

Michał Czakon

  • Institut für Theoretische Teilchenphysik und Kosmologie, RWTH Aachen University, D-52056 Aachen, Germany

David Heymes and Alexander Mitov

  • Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom

Davide Pagani

  • Technische Universität München, James-Franck-Straße 1, D-85748 Garching, Germany

Ioannis Tsinikos

  • Centre for Cosmology, Particle Physics and Phenomenology (CP3), Université Catholique de Louvain and Technische Universität München, James-Franck-Straße 1, D-85748 Garching, Germany

Marco Zaro

  • Nikhef, Science Park 105, NL-1098 XG Amsterdam, Netherlands; Sorbonne Universités, UPMC Université Paris 06, UMR 7589, LPTHE, F-75005 Paris, France, and CNRS, UMR 7589, LPTHE, F-75005 Paris, France

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Issue

Vol. 98, Iss. 1 — 1 July 2018

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