Electroweak phase transition: recent results

Details Electroweak phase transition: recent results Electroweak phase transition: recent results

1999-10-15

arxiv.org/abs/hep-ph/9910354v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 3 pages, 4 figures. Talk presented at the International Europhysics Conference on High Energy Physics (EPS-HEP99), Tamp

Scientific paper

Recent results of four-dimensional (4d) lattice simulations on the finite temperature electroweak phase transition (EWPT) are discussed. The phase transition is of first order in the SU(2)-Higgs model below the end point Higgs mass 66.5$\pm$1.4 GeV. For larger masses a rapid cross-over appears. This result completely agrees with the results of the dimensional reduction approach. Including the full Standard Model (SM) perturbatively the end point is at 72.1$\pm$1.4 GeV. Combined with recent LEP Higgs mass lower bounds, this excludes any EWPT in the SM. A one-loop calculation of the static potential makes possible a precise comparison of the lattice and perturbative results. Recent 4d lattice studies of the Minimal Supersymmetric SM (MSSM) are also mentioned.

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