A hybrid renormalization scheme removes linear divergences from baryon quasi-DAs on the lattice, producing smooth continuum distributions at multiple spacings.
Improving the Chiral Properties of Lattice Fermions
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abstract
The chiral properties of lattice fermions can be improved by altering either their fermion-gauge coupling or the pure gauge part of the action (or both). Using both perturbation theory and nonperturbative simulation, we compare a simple alteration of the gauge action (which encompasses the Wilson, Symanzik, Iwasaki, and DBW2 actions), and HYP-blocked links in the fermion action. Perturbative tests include calculations of the potential, flavor-changing quark scattering amplitudes, and matching factors for currents. Non-perturbative tests include the potential, measurements of flavor symmetry breaking for staggered fermions, the behavior of topological objects, and properties of overlap actions. Our results display the bad properties of these actions as well as their good ones.
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Metadynamics bias potentials and volume-extrapolation strategies reduce integrated autocorrelation times of topological charge in lattice gauge theories.
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Hybrid Renormalization for Baryon Distribution Amplitudes from Lattice QCD in LaMET
A hybrid renormalization scheme removes linear divergences from baryon quasi-DAs on the lattice, producing smooth continuum distributions at multiple spacings.
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Enhanced Sampling Techniques for Lattice Gauge Theory
Metadynamics bias potentials and volume-extrapolation strategies reduce integrated autocorrelation times of topological charge in lattice gauge theories.