Measuring infrared contributions to the QCD pressure

Details Measuring infrared contributions to the QCD pressure Measuring infrared contributions to the QCD pressure

2001-10-15

arxiv.org/abs/hep-lat/0110122v1

Nucl.Phys.Proc.Suppl. 106 (2002) 525-527

Physics

High Energy Physics

High Energy Physics - Lattice

3 pages; talk by Y. Schroder at Lattice2001(hightemp)

Scientific paper

For the pressure (or free energy) of QCD, four-dimensional (4d) lattice data is available at zero baryon density up to a few times the critical temperature $T_c$. Perturbation theory, on the other hand, has serious convergence problems even at very high temperatures. In a combined analytical and three-dimensional (3d) lattice method, we show that it is possible to compute the QCD pressure from about $2 T_c$ to infinity. The numerical accuracy is good enough to resolve in principle, e.g., logarithmic contributions related to 4-loop perturbation theory.

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