Journal
PHYSICAL REVIEW D
Volume 84, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.84.074004
Keywords
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Funding
- State of Rhineland-Palatinate via the Research Center Elementary Forces and Mathematical Foundations
- German Federal Ministry for Education and Research [05H09UME]
- German Research Foundation [NE398/3-1]
- European Commission through the LHCPhenoNet Initial Training Network [PITN-GA-2010-264564]
- Schweizer Nationalfonds [200020-124773]
- National Science Foundation [PHY-1068317]
- Swiss National Science Foundation (SNF) [200020_124773] Funding Source: Swiss National Science Foundation (SNF)
- Direct For Mathematical & Physical Scien
- Division Of Physics [1068317] Funding Source: National Science Foundation
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We make use of recent results in effective theory and higher-order perturbative calculations to improve the theoretical predictions of the QCD contribution to the top-quark pair production forward-backward asymmetry at the Tevatron. In particular, we supplement the fixed-order next-to-leading order calculation with higher-order corrections from soft-gluon resummation at next-to next-to-leading order accuracy performed in two different kinematic schemes, which allows us to make improved predictions for the asymmetry in the p (p) over bar and t (t) over bar rest frames as a function of the rapidity and invariant mass of the t (t) over bar pair. Furthermore, we provide binned results which can be compared with the recent measurements of the forward-backward asymmetry in events with a large pair invariant mass or rapidity difference. Finally, we calculate at NLO + NNLL order the top-quark charge asymmetry at the LHC as a function of a lower rapidity cutoff for the top and antitop quarks.
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