Top-quark pair production at next-to-next-to-leading order QCD in electron positron collisions

Abstract

We set up a formalism, within the antenna subtraction framework, for computing the production of a massive quark-antiquark pair in electron positron collisions at next-to-next-to-leading order in the coupling ${\alpha }_s$ of quantum chromodynamics at the differential level. Our formalism applies to the calculation of any infrared-safe observable. We apply this set-up to the production of top-quark top antiquark pairs in the continuum. We compute the production cross section and several distributions. We determine, in particular, the top-quark forward-backward asymmetry at order ${\alpha }_s^2$. Our result agrees with previous computations of this observable.

Latex, 33 pages, reference added

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Cited by in corpus (6)

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• NLO QCD corrections to off-shell top-antitop production with semi-leptonic decays at lepton colliders
• Revisiting the top-quark pair production at future $e^{+}{e}^{-}$ colliders
• Precise evaluation of $h\to c\bar{c}$ and axion-like particle production
• Electroweak radiative corrections to polarized top quark pair production