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Top Quark Pair Production at Threshold: Complete Next-to-next-to-leading Order Relativistic Corrections
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Top Quark Pair Production at Threshold: Complete Next-to-next-to-leading Order Relativistic Corrections
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The complete next-to-next-to-leading order (i.e. $O(v^2)$, $O(v \alpha_s)$ and $O(\alpha_s^2)$) relativistic corrections to the total photon mediated $t\bar t$ production cross section at threshold are presented in the framework of nonrelativistic quantum chromodynamics. The results are obtained using semi-analytic methods and ``direct matching''. The size of the next-to-next-to-leading order relativistic corrections is found to be comparable to the size of the next-to-leading order ones.
Forward citations
Cited by 2 Pith papers
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Top-Antitop Production and Decay at Threshold at the LHC in QCD Perturbation Theory
NLO+PS generators with resummed Coulomb threshold corrections show that N3LO already captures most of the ATLAS-bin enhancement, finite-width effects are small, and the loosely defined toponium piece is only a few picobarns.
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Top-Antitop Production and Decay at Threshold at the LHC in QCD Perturbation Theory
All-order threshold-enhanced QCD corrections in three new NLO+PS generators predict a ~10 pb ttbar cross section in the ATLAS threshold bin and reduce the toponium excess to a perturbative QCD effect.
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