A Ghost Story II: Ghosts, Gluons and the Gluon condensate beyond the IR of QCD

Abstract

Beyond the deep IR, the analysis of ghost and gluon propagators still keeps very interesting non-perturbative information. The Taylor-scheme coupling can be computed and applied to obtain the ${\Lambda }_{\mathrm{QCD}}$ parameter from Landau gauge lattice simulations. Furthermore, a dimension-two gluon condensate, that can be understood in the instanton liquid model, plays an important role in the game.

arXiv comment12 pp., 3 figs