Pressure of the Standard Model at High Temperatures
Abstract
We compute the pressure of the standard model at high temperatures in the symmetric phase to three loops, or to O(g5) in all coupling constants. We find that the terms of the perturbative expansion in the SU(2) + Higgs sector decrease monotonically with increasing order, but the large values of the strong coupling constant gs and the Yukawa coupling of the top quark gY make the expansion in the full theory converge more slowly. The final result is observed to be about 10% smaller than the ideal gas pressure commonly used in cosmological calculations.
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