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Hadron properties from lattice QCD
(2014)
We discuss the status of current dyanmical lattice QCD simulations in connection to the emerging results on the low-lying baryon spectrum, excited states of the nucleon and the investigation of the structure of scalar ...
First moment of the flavour octet nucleon parton distribution function using lattice QCD
(2015)
Abstract: We perform a lattice computation of the flavour octet contribution to the average quark momentum in the nucleon, (Formula presented.). In particular, we fully take the disconnected contributions into account in ...
Evaluation of disconnected quark loops for hadron structure using GPUs
(2014)
A number of stochastic methods developed for the calculation of fermion loops are investigated and compared, in particular with respect to their efficiency when implemented on Graphics Processing Units (GPUs). We assess ...
Higher representations on the lattice: Perturbative studies
(2008)
We present analytical results to guide numerical simulations with Wilson fermions in higher representations of the colour group. The ratio of Λ parameters, the additive renormalization of the fermion mass, and the ...
Topological susceptibility of SU(N) gauge theories at finite temperature
(2004)
We investigate the large-N behavior of the topological susceptibility χ in four-dimensional SU(N) gauge theories at finite temperature, and in particular across the finite-temperature transition at Tc. For this purpose, ...
Non-perturbative renormalization of quark bilinear operators with N f = 2 (tmQCD) Wilson fermions and the tree-level improved gauge action
(2010)
We present results for the renormalization constants of bilinear quark operators obtained by using the tree-level Symanzik improved gauge action and the N f = 2 twisted mass fermion action at maximal twist, which guarantees ...
The three-loop β-function of SU(N) lattice gauge theories with Wilson fermions
(1998)
We calculate the third coefficient of the lattice β-function associated with the Wilson formulation for both gauge fields and fermions. This allows us to evaluate the three-loop correction (linear in g2 0) to the relation ...
The two-loop relation between the bare lattice coupling and the MS coupling in QCD with Wilson fermions
(1998)
We calculate the two-loop relation between the coupling renormalized in the MS̄ scheme and the bare lattice coupling g0 in QCD with Wilson fermions, extending the pure gauge results of Lüscher and Weisz. Our calculation ...
O(a 2) corrections to the one-loop propagator and bilinears of clover fermions with Symanzik improved gluons
(2009)
We calculate corrections to the fermion propagator and to the Green's functions of all fermion bilinear operators of the form , to one-loop in perturbation theory. We employ the Wilson/clover action for fermions and the ...
Precision study of excited state effects in nucleon matrix elements
(2011)
We present a dedicated analysis of the influence of excited states on the calculation of nucleon matrix elements. This calculation is performed at a fixed value of the lattice spacing, volume and pion mass that are typical ...