2003/03/24 by Frithjof Karsch, F. Karsch, E. Laermann +3 · 1 citation
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum Chromodynamics and Particle Interactions #Theoretical and Computational Physics #hep-lat
paper · pdf · doi:10.1103/physrevd.68.014504
published as Phys.Rev. D68 (2003) 014504 · 25 pages, 8 figures
arxiv created 2003/03/24 · openalex publication_date 2003/07/10 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
We analyze the cutoff dependence of mesonic spectral functions calculated at finite temperature on Euclidean lattices with a finite temporal extent. In the infinite temperature limit we present analytic results for lattice spectral functions calculated with standard Wilson fermions as well as a truncated perfect action. We explicitly determine the influence of ``Wilson doublers'' on the high momentum structure of the mesonic spectral functions and show that this cutoff effect is strongly suppressed when using an improved fermion action.