arXiv:0710.2965·v1·High Energy Physics — Lattice
Running alpha(s) from Landau-gauge gluon and ghost correlations
A. Sternbeck🇦🇺 · E.-M. Ilgenfritz🇩🇪 · K. Maltman🇦🇺 · M. Müller-Preussker🇩🇪 · L. von Smekal🇦🇺 · A. G. Williams🇦🇺
Abstract
We estimate the running coupling constant of the strong interactions within the nonperturbative framework of lattice QCD in Landau gauge. Our calculation is based on the ghost-gluon vertex which in the particular case of Landau gauge allows for a definition of alpha(s) in a MOM scheme solely in terms of the gluon and ghost dressing functions. As a first step we investigate the zero and two-flavour case and report here on preliminary results.
Comments: 7 pages, 4 figures. Presented at the XXV International Symposium on Lattice Field Theory, July 30 - August 4 2007, Regensburg, Germany