Ghost-gluon coupling power corrections and $\Lambda_{\overline{MS}}$ from twisted-mass lattice QCD at $N_f=2$

Mario Gravina
2011 Proceedings of The XXVIII International Symposium on Lattice Field Theory — PoS(Lattice 2010)   unpublished
A non-perturbative calculation of the ghost-gluon running QCD coupling constant is performed using N f = 2 twisted-mass dynamical fermions. The extraction of Λ MS in the chiral limit reveals the presence of a non-perturbative OPE contribution that is assumed to be dominated by a dimension-two A 2 condensate. In this contest a novel method for calibrating the lattice spacing in lattice simulations is presented.
doi:10.22323/1.105.0227 fatcat:i5alsnww45acll4saus2hlyofe