Nonperturbative Condensates in the Electroweak Phase-Transition

Details Nonperturbative Condensates in the Electroweak Phase-Transition Nonperturbative Condensates in the Electroweak Phase-Transition

1995-08-23

arxiv.org/abs/hep-ph/9508352v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

20 pages, LaTeX, 4 figures, Talk given by C. Wetterich at the 3rd Colloque Cosmologie, Paris, June 7-9, 1995, to appear in the

Scientific paper

We discuss the electroweak phase-transition in the early universe, using non-perturbative flow equations for a computation of the free energy. For a scalar mass above $\sim 70$ GeV, high-temperature perturbation theory cannot describe this transition reliably. This is due to the dominance of three-dimensional physics at high temperatures which implies that the effective gauge coupling grows strong in the symmetric phase. We give an order of magnitude-estimate of nonperturbative effects in reasonable agreement with recent results from electroweak lattice simulations. (Talk given by C. Wetterich at the 3rd Colloque Cosmologie, Paris, June 7-9, 1995, to appear in the proceedings)

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