Running alpha(s) from Landau-gauge gluon and ghost correlations

Details Running alpha(s) from Landau-gauge gluon and ghost correlations Running alpha(s) from Landau-gauge gluon and ghost correlations

2007-10-16

arxiv.org/abs/0710.2965v1

PoS LAT2007:256,2007

Physics

High Energy Physics

High Energy Physics - Lattice

7 pages, 4 figures. Presented at the XXV International Symposium on Lattice Field Theory, July 30 - August 4 2007, Regensburg,

Scientific paper

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.

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