The strength of the electroweak phase transition at $m_H\approx$ 80 GeV

Abstract

In this letter we present the results of our numerical simulations for the finite temperature electroweak phase transition using the SU(2)-Higgs model on four-dimensional lattices at $m_H\approx 80$ GeV. The temporal extension $L_t=2$ is used for asymmetric lattice spacings with an asymmetry parameter $a_s/a_t\approx 4$. The measured thermodynamical quantities (interface tension, jump of the order parameter and latent heat) suggest that the phase transition is of very weakly first order.

Latex, 10 pages, 3 figures (4 ps files), published version, with minor changes

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