Infinite temperature limit of meson spectral functions calculated on the lattice

Details Infinite temperature limit of meson spectral functions calculated on the lattice Infinite temperature limit of meson spectral functions calculated on the lattice

2003-03-24

arxiv.org/abs/hep-lat/0303017v1

Phys.Rev. D68 (2003) 014504

Physics

High Energy Physics

High Energy Physics - Lattice

25 pages, 8 figures

Scientific paper

10.1103/PhysRevD.68.014504

We analyze the cut-off dependence of mesonic spectral functions calculated at finite temperature on Euclidean lattices with 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 cut-off effect is strongly suppressed when using an improved fermion action.

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