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Parton distributions from lattice QCD with momentum smearing
(Proceedings of Science (PoS), 2016)
In this work we continue our effort to explore a recent proposal, which allows light-cone distributions to be extracted from purely spatial correlations, being thus accessible to lattice methods. In order to test the ...
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 ...
A lattice calculation of parton distributions
(Proceedings of Science (PoS), 2016)
We present results for the x dependence of the unpolarized, helicity, and transversity isovector quark distributions in the proton using lattice QCD, employing the method of quasi-distributions proposed by Ji in 2013. ...
Recent results for the proton spin decomposition from lattice QCD
(Proceedings of Science (PoS), 2016)
The exact decomposition of the proton spin has been a much debated topic, on the experimental as well as the theoretical side. In this talk we would like to report on recent non-perturbative results and ongoing efforts to ...
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 ...