2002/11/19 by Thomas DeGrand, Anna Hasenfratz, Tamás G. Kovács +1 · 77 citations
Physics and Astronomy · #Chiral anomaly #Chiral perturbation theory #Chiral symmetry breaking #Fermion #Gauge anomaly #Gauge theory #Hamiltonian lattice gauge theory #High-Energy Particle Collisions Research #Lattice (music) #Lattice gauge theory #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Quark #Theoretical physics #hep-lat
paper · pdf · doi:10.1103/physrevd.67.054501
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 67(5) (American Physical Society) · 17 pages, 11 figures; Figure 7 replaced
arxiv created 2002/11/19 · openalex publication_date 2003/03/10 · arxiv updated 2016/09/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 doubly blocked from Wilson action in two coupling space (DWB2) actions], and hypercubic-blocked links in the fermion action. Perturbative tests include calculations of the potential, flavor-changing quark scattering amplitudes, and matching factors for currents. Nonperturbative 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.