Precision determination of r₀ΛMS from the QCD static energy.

Determination of ΛMS from the static quark-antiquark potential in momentum space

QCD phenomenology of static sources and gluonic excitations at short distances

New lattice data for the Πu and Σ − u potentials at short distances are presented. We compare perturbation theory to the lower static hybrid potentials and find good agreement at short distances, once the renormalon ambiguities are accounted for. We use the non-perturbatively determined continuum-limit static hybrid and ground state potentials at short distances to determine the gluelump energi...

Asymptotic behaviour of the gluon propagator from lattice QCD

We study the flavorless gluon propagator in the Landau gauge from high statistics lattice calculations. Hypercubic artifacts are efficiently eliminated by taking the ∑ pμ → 0 limit. The propagator is fitted to the three-loops perturbative formula in an energy window ranging form ∼ 2.5 GeV up to ∼ 5.5 GeV. αs is extracted from the best fit in a continuous set of renormalisation schemes. The fits...

Complete Renormalization Group Improvement- Avoiding Factorization and Renormalization Scale Dependence in QCD Predictions

For moments of leptoproduction structure functions we show that all dependence on the renormalization and factorization scales disappears provided that all the ultraviolet logarithms involving the physical energy scale Q are completely resummed. The approach is closely related to Grunberg’s method of Effective Charges. A direct and simple method for extracting ΛMS from experimental data is advo...

Λ-parameter of lattice QCD with the overlap-Dirac operator

We compute the ratio ΛL/ΛMS between the scale parameter ΛL, associated with a lattice formulation of QCD using the overlap-Dirac operator, and ΛMS of the MS renormalization scheme. To this end, the necessary one-loop relation between the lattice coupling g0 and the coupling renormalized in the MS scheme is calculated, using the lattice background field technique.