Four-dimensional simulation of the hot electroweak phase transition with the SU(2) gauge-Higgs model

We study the finite-temperature electroweak phase transition of the minimal standard model within the four-dimensional SU(2) gauge-Higgs model. Monte Carlo simulations are performed for intermediate values of the Higgs boson mass in the range $50\lesssim M_H\lesssim 100$ GeV on a lattice with the temporal size $N_t$=2. The order of the transition is systematically examined using finite-size scaling methods. The behavior of the interface tension and the latent heat for an increasing Higgs boson mass is also investigated. Our results suggest that the first-order transition terminates around $M_H\sim 80$ GeV.