Improved Staggered Fermion Actions for QCD Thermodynamics

Details Improved Staggered Fermion Actions for QCD Thermodynamics Improved Staggered Fermion Actions for QCD Thermodynamics

1999-01-12

arxiv.org/abs/hep-lat/9901010v1

Phys.Rev.D60:114502,1999

Physics

High Energy Physics

High Energy Physics - Lattice

23 pages, 6 figures

Scientific paper

10.1103/PhysRevD.60.114502

We analyze the cut-off dependence of the fermion contribution to the finite temperature free energy density in ${\cal O}(g^2)$ lattice perturbation theory for several improved staggered fermion actions. Cut-off effects are drastically reduced for the Naik action and an action with improved rotational symmetry of the quark propagator. We show that improvement of rotational symmetry at ${\cal O}(g^2)$ further reduces cut-off effects in thermodynamic observables. We also show that the introduction of fat-links does not have a significant influence on cut-off distortions at ${\cal O}(g^2)$.

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