Pade Improvement of the Free Energy in High Temperature QCD

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Abstract
Pade approximants (PA's) are constructed from the perturbative coefficients of the free energy through O(g^5) 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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