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Comparing perturbative calculations with a lattice computation of the staticenergy in quantum chromodynamics at short distances, we obtain a determinationof the strong coupling alpha_s. Our determination is performed at a scale ofaround 1.5 GeV (the typical distance scale of the lattice data) and, whenevolved to the Z-boson mass scale M_Z, it corresponds toalpha_s(M_Z)=0.1156^{+0.0021}_{-0.0022}.

alpha_s from the static energy in QCD