2004/12/14 by Waseem Kamleh, Patrick O. Bowman, Derek B. Leinweber +2 · 19 citations
Mathematics · Physics and Astronomy · #Action (physics) #Discretization #Fermion #Gauge theory #Geometry #High-Energy Particle Collisions Research #Lattice (music) #Lattice gauge theory #Mathematical analysis #Mathematical physics #Mathematics #Particle physics #Particle physics theoretical and experimental studies #Physics #Propagator #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum electrodynamics #Quantum mechanics #Quark #Scaling #hep-lat
paper · pdf · doi:10.1103/physrevd.71.094507
published in Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields 71(9) (American Physical Society)
arxiv created 2004/12/14 · openalex publication_date 2005/05/23 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Fat link irrelevant clover (FLIC) overlap fermions are a variant of the standard (Wilson) overlap action, with the FLIC action as the overlap kernel rather than the Wilson action. The structure of the FLIC overlap fermion propagator in momentum space is studied, and a comparison against previous studies of the Wilson overlap propagator in quenched QCD is performed. To explore the scaling properties of the propagator for the two actions, numerical calculations are performed in Landau gauge across three lattices with different lattice spacing a and similar physical volumes. We find that at light quark masses the actions agree in both the infrared and the ultraviolet, but at heavier masses some disagreement in the ultraviolet appears. This is attributed to the two actions having different discretisation errors with the FLIC overlap providing superior performance in this regime. Both actions scale reasonably, but some scaling violations are observed.