Thermodynamics of Four-Flavour QCD with Improved Staggered Fermions

Details Thermodynamics of Four-Flavour QCD with Improved Staggered Fermions Thermodynamics of Four-Flavour QCD with Improved Staggered Fermions

1996-12-19

arxiv.org/abs/hep-lat/9612018v1

Phys.Lett. B396 (1997) 210-216

Physics

High Energy Physics

High Energy Physics - Lattice

12 pages, LaTeX2e File, 11 encapsulated postscript files

Scientific paper

10.1016/S0370-2693(97)00114-7

We have calculated the pressure and energy density in four-flavour QCD using improved fermion and gauge actions. We observe a strong reduction of finite cut-off effects in the high temperature regime, similar to what has been noted before for the SU(3) gauge theory. Calculations have been performed on $16^3\times 4$ and 16^4 lattices for two values of the quark mass, $ma = 0.05$ and 0.1. A calculation of the string tension at zero temperature yields a critical temperature $T_c/\sqrt{\sigma} = 0.407 \pm 0.010$ for the smaller quark mass value.

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