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Non-perturbative improvement of stout-smeared three flavour clover fermions
N. Cundy, M. Göckeler, R. Horsley +11
We discuss a 3-flavour lattice QCD action with clover improvement in which the fermion matrix has single level stout smearing for the hopping terms together with unsmeared links fo…
The Landau gauge lattice ghost propagator in stochastic perturbation theory
F. Di Renzo, E. -M. Ilgenfritz, H. Perlt +2
We present one- and two-loop results for the ghost propagator in Landau gauge calculated in Numerical Stochastic Perturbation Theory (NSPT). The one-loop results are compared with…
The operator product expansion on the lattice
W. Bietenholz, N. Cundy, M. Göckeler +8
We investigate the Operator Product Expansion (OPE) on the lattice by directly measuring the product <Jmu Jnu> (where J is the vector current) and comparing it with the expectation…
Operator product expansion on the lattice: analytic Wilson coefficients
M. Göckeler, R. Horsley, H. Perlt +3
We present first results for Wilson coefficients of operators up to first order in the covariant derivatives for the case of Wilson fermions. They are derived from the off-shell Co…
One-loop Renormalisation of Lattice QCD Operators for Non-forward Matrix Elements: From Clover to Overlap Fermions
M. Göckeler, R. Horsley, H. Perlt +3
We consider the renormalisation of composite quark-antiquark operators with one and two lattice covariant derivatives related to the lowest moments of generalised parton distributi…
Distribution Amplitudes of Pseudoscalar Mesons
V. M. Braun, M. Gockeler, R. Horsley +8
We present results for the first two moments of the distribution amplitudes of pseudoscalar mesons. Using two flavors of non-perturbatively improved clover fermions and non-perturb…