Computation of the strong coupling in QCD with two dynamical flavors Original Research Article

We present a non-perturbative computation of the running of the coupling image in QCD with two flavors of dynamical fermions in the Schrödinger functional scheme. We improve our previous results by a reliable continuum extrapolation. The Λ-parameter characterizing the high-energy running is related to the value of the coupling at low energy in the continuum limit. An estimate of image is given using large-volume data with lattice spacings a from image to image. It translates into image [assuming image]. The last step still has to be improved to reduce the uncertainty.