Pade Improvement of the Free Energy in High Temperature QCD
Abstract
Pade approximants (PA's) are constructed from the perturbative coefficients of the free energy through O(g5) in hot QCD. Pade summation is shown to reduce the renormalization-scale dependence substantially even at temperature (T) as low as 250 MeV. Also, PA's predict that the free energy does not deviate more than 10 % from the Stefan-Boltzmann limit for T > 250 MeV.
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