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arxiv: 1410.3165 · v1 · pith:VPEPVHB5new · submitted 2014-10-12 · ✦ hep-ph · hep-ex

Top-quark forward-backward asymmetry in e+e- annihilation at NNLO in QCD

classification ✦ hep-ph hep-ex
keywords asymmetryforward-backwardannihilationelectroweaknext-to-next-to-leadingorderquarktop-quark
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We report on a complete calculation of electroweak production of top quark pairs in $e^+e^-$ annihilation at next-to-next-to-leading order in Quantum Chromodynamics. Our setup is fully differential and can be used to calculate any infrared-safe observable. Especially we calculated the next-to-next-to-leading order corrections to top-quark forward-backward asymmetry and found sizable effects. Our results show a large reduction of the theoretical uncertainties in predictions of the forward-backward asymmetry, and allow a precision determination of the top quark electroweak couplings at future $e^+e^-$ colliders.

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