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

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 $a_s\mathrm{/}{a}_t\approx 4$. 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.