1208.4850 (Xavier Garcia i Tormo)

alpha_s from the static energy in QCD    [PDF]

Xavier Garcia i Tormo

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

View original: http://arxiv.org/abs/1208.4850