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Improving the Chiral Properties of Lattice Fermions

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arxiv hep-lat/0211006 v2 pith:57NJNZCI submitted 2002-11-04 hep-lat

Thomas DeGrand , Anna Hasenfratz , Tamas G. Kovacs This is my paper · ORCID
classification hep-lat
keywords propertiesactionactionsfermionschiralgaugeincludelattice
verification ladder T0 review T1 audit T2 compute T3 formal

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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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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Hybrid Renormalization for Baryon Distribution Amplitudes from Lattice QCD in LaMET

    hep-lat 2026-04 unverdicted novelty 6.0 of 10

    A hybrid renormalization scheme removes linear divergences from baryon quasi-DAs on the lattice, producing smooth continuum distributions at multiple spacings.

  2. BMW/DMZ calculation of the hadronic vacuum polarisation for the muon magnetic moment

    hep-lat 2026-03 conditional novelty 6.0 of 10

    A hybrid lattice-QCD plus e+e- data determination of the hadronic vacuum polarisation gives a Standard Model muon g-2 prediction 0.5σ from experiment, at 0.45% precision.

  3. Parallel Tempered Metadynamics for full QCD

    hep-lat 2026-07 conditional novelty 5.0 of 10

    In N_f=2 staggered QCD at beta=1.15, PT-MetaD tunnels between topological sectors while RHMC remains frozen, yielding chi_top V = 0.127(33).

  4. Lattice gradient flows (de-)stabilizing topological sectors

    hep-lat 2024-11 conditional novelty 5.0 of 10

    Iwasaki and DBW2 gradient flows keep the topological charge of SU(2) gauge configurations stable at long flow times, unlike Wilson and Symanzik flows; DBW2 quantizes the charge already near t=0.5.

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