Thermodynamics with 2+1 and 3 Flavors of Improved Staggered Quarks

Details Thermodynamics with 2+1 and 3 Flavors of Improved Staggered Quarks Thermodynamics with 2+1 and 3 Flavors of Improved Staggered Quarks

2001-10-09

arxiv.org/abs/hep-lat/0110030v1

Nucl.Phys.A702:140-145,2002

Physics

High Energy Physics

High Energy Physics - Lattice

5 pages, 12 figures, contribution to "Statistical QCD", August 26--30, 2001, Bielefeld, Germany

Scientific paper

10.1016/S0375-9474(02)00697-8

We present preliminary results from exploring the phase diagram of finite temperature QCD with three degenerate flavors and with two light flavors and the mass of the third held approximately at the strange quark mass. We use an order $\alpha_s^2 a^2, a^4$ Symanzik improved gauge action and an order $\alpha_s a^2, a^4$ improved staggered quark action. The improved staggered action leads to a dispersion relation with diminished lattice artifacts, and hence better thermodynamic properties. It decreases the flavor symmetry breaking of staggered quarks substantially, and we estimate that at the transition temperature for an $N_t=8$ to $N_t=10$ lattice {\em all} pions will be lighter than the lightest kaon. Preliminary results on lattices with $N_t=4$, 6 and 8 are presented.

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