Pressure of the Standard Model at High Temperatures

Details Pressure of the Standard Model at High Temperatures Pressure of the Standard Model at High Temperatures

2005-10-28

arxiv.org/abs/hep-ph/0510375v2

JHEP 0601:060,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

30 pages, 4 figures. v2: one reference added, minor revisions, accepted for publication in JHEP

Scientific paper

10.1088/1126-6708/2006/01/060

We compute the pressure of the standard model at high temperatures in the symmetric phase to three loops, or to O(g^5) 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 g_s and the Yukawa coupling of the top quark g_Y 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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