Where does the hot electroweak phase transition end?

Details Where does the hot electroweak phase transition end? Where does the hot electroweak phase transition end?

1998-09-07

arxiv.org/abs/hep-ph/9809293v2

Nucl.Phys.Proc.Suppl. 73 (1999) 659-661

Physics

High Energy Physics

High Energy Physics - Phenomenology

LATTICE98(electroweak), presented by Z. Fodor. Latex, 3 pages, 3 figu res. Comment line changed

Scientific paper

10.1016/S0920-5632(99)85166-4

We give the nonperturbative phase diagram of the four-dimensional hot electroweak phase transition. A systematic extrapolation $a \to 0$ is done. Our results show that the finite temperature SU(2)-Higgs phase transition is of first order for Higgs-boson masses $m_H<66.5 \pm 1.4$ GeV. The full four-dimensional result agrees completely with that of the dimensional reduction approximation. This fact is of particular importance, because it indicates that the fermionic sector of the Standard Model (SM) can be included perturbatively. We obtain that the Higgs-boson endpoint mass in the SM is $72.4 \pm 1.7$ GeV. Taking into account the LEP Higgs-boson mass lower bound excludes any electroweak phase transition in the SM.

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