Ghost-gluon coupling, power corrections and from twisted-mass lattice QCD at
arXiv:1010.5724
Abstract
A non-perturbative calculation of the ghost-gluon running QCD coupling constant is performed using twisted-mass dynamical fermions. The extraction of in the chiral limit reveals the presence of a non-perturbative OPE contribution that is assumed to be dominated by a dimension-two $\VEV{A^2}$ condensate. In this contest a novel method for calibrating the lattice spacing in lattice simulations is presented.
7 pages, 4 figures, XXVIII International Symposium on Lattice Field Theory 2010