Scale dependence of top-quark cross section at e+e- colliders near production threshold at NNNLO
Abstract
The top-quark threshold cross section at e+e- colliders near production threshold is investigated. We study the scale dependence of the cross section for σ(e+e- ttX) near s 2mt and discuss the theoretical accuracy of the NNNLO prediction. We report that a threshold scan at an e+e- collider would allow a determination of the top-quark mass with an accuracy of order 30 MeV.
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