229 citations · 6.9k across the 257 of their papers we have counts for
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Transverse spin structure of the nucleon from lattice QCD simulations
M. Göckeler, Ph. Hägler, R. Horsley +7
We present the first calculation in lattice QCD of the lowest two moments of transverse spin densities of quarks in the nucleon. They encode correlations between quark spin and orb…
Nucleon Form Factors: Probing the Chiral Limit
M. Gockeler, Ph. Hageler, R. Horsley +9
The electromagnetic form factors provide important hints for the internal structure of the nucleon and continue to be of major interest for experimentalists. For an intermediate ra…
Simulating at Realistic Quark Masses: Pseudoscalar Decay Constants and Chiral Logarithms
M. Göckeler, R. Horsley, Y. Nakamura +7
Due to improvements in computer performance and algorithms, the rapidly increasing cost for unquenched Wilson-type fermions with lighter quarks has been ameliorated and new simulat…
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…
Probing Nucleon Structure on the Lattice
M. Göckeler, Ph. Hägler, R. Horsley +8
The QCDSF/UKQCD collaboration has an ongoing program to calculate nucleon matrix elements with two flavours of dynamical O(a) improved Wilson fermions. Here we present recent resul…
The pion form factor from lattice QCD with two dynamical flavours
D. Brömmel, M. Diehl, M. Göckeler +9
We compute the electromagnetic form factor of the pion using non-perturbatively O(a) improved Wilson fermions. The calculations are done for a wide range of pion masses and lattice…
Hadron spectrum, quark masses and decay constants from light overlap fermions on large lattices
D. Galletly, M. Gürtler, R. Horsley +5
We present results from a simulation of quenched overlap fermions with Lüscher-Weisz gauge field action on lattices up to and for pion masses down to MeV. A…
Moments of pseudoscalar meson distribution amplitudes from the lattice
V. M. Braun, M. Göckeler, R. Horsley +8
Based on lattice simulations with two flavours of dynamical, O(a)-improved Wilson fermions we present results for the first two moments of the distribution amplitudes of pseudoscal…
Renormalisation of Composite Operators in Lattice Perturbation Theory with Clover Fermions: Non-forward Matrix Elements
M. Göckeler, R. Horsley, H. Perlt +4
We consider the renormalisation of lattice QCD operators with one and two covariant derivatives related to the first and second moments of generalised parton distributions and meso…
Axial coupling constant of the nucleon for two flavours of dynamical quarks in finite and infinite volume
A. Ali Khan, M. Göckeler, Ph. Hägler +8
We present data for the axial coupling constant g_A of the nucleon obtained in lattice QCD with two degenerate flavours of dynamical non-perturbatively improved Wilson quarks. The…
Determining the strange quark mass for 2-flavour QCD
M. Göckeler, R. Horsley, A. C. Irving +5
Using the O(a) Symanzik improved action an estimate is given for the strange quark mass for unquenched (n_f=2) QCD. The determination is via the axial Ward identity (AWI) and inclu…
Estimating the Unquenched Strange Quark Mass from the Lattice Axial Ward Identity
M. Göckeler, R. Horsley, A. C. Irving +5
We present a determination of the strange quark mass for two flavours (nf=2) of light dynamical quarks using the axial Ward identity. The calculations are performed on the lattice…