229 citations · 6.9k across the 257 of their papers we have counts for
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Quark masses from quenched overlap fermions
Martin Gürtler, Thomas Streuer, Gerrit Schierholz +3
We compute light and strange quark masses for quenched overlap fermions at two values of the gauge coupling. The renormalisation is done non-perturbatively. We test the predictions…
Nucleon structure from generalized parton distributions in lattice QCD
M. Gockeler, Ph. Hagler, R. Horsley +5
This talk presents results from the QCDSF-UKQCD collaboration for moments of leading twist generalized parton distributions in two-flavor lattice QCD based on O(a) improved Wilson…
Perturbative Renormalisation for Low Moments of Generalised Parton Distributions with Clover Fermions
M. Gockeler, R. Horsley, H. Perlt +4
We present the non-forward quark matrix elements of operators with one and two covariant derivatives needed for the renormalisation of the first and second moments of generalised p…
Soffer Bound and Transverse Spin Densities from Lattice QCD
M. Diehl, M. Gockeler, Ph. Hagler +6
Generalized transversity distributions encode essential information on the internal structure of hadrons related to transversely polarized quarks. Lattice QCD allows us to compute…
Second moment of the pion's distribution amplitude
M. Göckeler, R. Horsley, D. Pleiter +5
We present preliminary results from the QCDSF/UKQCD collaborations for the second moment of the pion's distribution amplitude with two flavours of dynamical fermions. We use nonper…
The axial charge of the nucleon on the lattice and in chiral perturbation theory
A. Ali Khan, M. Göckeler, P. Hägler +10
We present recent Monte Carlo data for the axial charge of the nucleon obtained by the QCDSF-UKQCD collaboration for N_f=2 dynamical quarks. We compare them with formulae from chir…
Nucleon Structure from Quenched Overlap Fermions
D. Galletly, M. Gürtler, R. Horsley +6
We compute the lowest moments of the nucleon's structure functions using quenched overlap fermions at two different lattice spacings. The renormalisation is done nonperturbatively…
Stochastic Perturbation Theory and the Gluon Condensate
P. E. L. Rakow
On the lattice searching for the gluon condensate is difficult because a large perturbative contribution to the expectation value of the action has to be subtracted before looking…
Non-perturbative renormalisation for overlap fermions
M. Gürtler, R. Horsley, P. E. L. Rakow +3
Using non-perturbative techniques we have found the renormalisation factor, Z, in the RI-MOM scheme for quark bilinear operators in quenched QCD. We worked with overlap fermions us…
Meson decay constants from Nf=2 clover fermions
M. Göckeler, R. Horsley, D. Pleiter +5
We present recent results for meson decay constants calculated on configurations with two flavours of O(a)-improved Wilson fermions. Non-perturbative renormalisation is applied and…
A determination of the strange quark mass for unquenched clover fermions using the AWI
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 (nf=2) QCD. The determination is via the axial Ward identity (AWI) and includ…
Perturbative renormalisation of quark bilinear operators for overlap fermions with and without stout links and improved gauge action
R. Horsley, H. Perlt, P. E. L. Rakow +2
We calculate lattice renormalisation constants of local and one-link quark operators for overlap fermions and improved gauge actions in one-loop perturbation theory. For the local…
Structure of the Pion from Full Lattice QCD
D. Brömmel, M. Diehl, M. Göckeler +7
Moments of generalised parton distributions can be related to off-forward matrix elements of local operators. We calculate a few of the leading twist matrix elements for the pion o…
Quark helicity flip generalized parton distributions from two-flavor lattice QCD
M. Gockeler, Ph. Hagler, R. Horsley +5
We present an initiatory study of quark helicity flip generalized parton distributions (GPDs) in n_f=2 lattice QCD, based on clover-improved Wilson fermions for a large number of c…
Investigation of the Second Moment of the Nucleon's g1 and g2 Structure Functions in Two-Flavor Lattice QCD
M. Göckeler, R. Horsley, D. Pleiter +5
The reduced matrix elements a_2 and d_2 are computed in lattice QCD with N_f=2 flavors of light dynamical (sea) quarks. For proton and neutron targets we obtain as our best estimat…
Renormalisation of one-link quark operators for overlap fermions with Lüscher-Weisz gauge action
R. Horsley, H. Perlt, P. E. L. Rakow +2
We compute lattice renormalisation constants of one-link quark operators ({\it i.e.} operators with one covariant derivative) for overlap fermions and Lüscher-Weisz gauge action in…
A Determination of the Lambda Parameter from Full Lattice QCD
M. Göckeler, R. Horsley, A. C. Irving +4
We present a determination of the QCD parameter Lambda in the quenched approximation (n_f=0) and for two flavours (n_f=2) of light dynamical quarks. The calculations are performed…
Generalized parton distributions and transversity from full lattice QCD
M. Gockeler, Ph. Hagler, R. Horsley +5
We present here the latest results from the QCDSF collaboration for moments of generalized parton distributions and transversity in two-flavour QCD, including a preliminary analysi…