First determination of the strong coupling constant using NNLO predictions for hadronic event shapes in e^+e^- annihilations

G. Dissertori, A. Gehrmann-De Ridder, T. Gehrmann +3

We present the first determination of the strong coupling constant from a fit of next-to-next-to-leading order QCD predictions to event-shape variables, measured in $e^{+}{e}^{-}$ annihi…