Gauge Invariant Treatment of the Electroweak Phase Transition

Details Gauge Invariant Treatment of the Electroweak Phase Transition Gauge Invariant Treatment of the Electroweak Phase Transition

1994-03-30

arxiv.org/abs/hep-ph/9403391v1

Phys.Lett.B331:131-136,1994

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages latex, DESY-94-043, 4 figures can be obtained via e-mail from hebecker@vxdesy.desy.de

Scientific paper

10.1016/0370-2693(94)90953-9

We evaluate the gauge invariant effective potential for the composite field $\sigma=2\Phi^{\dagger}\Phi$ in the SU(2)-Higgs model at finite temperature. Symmetric and broken phases correspond to the domains $\sigma\leq T^2/3$ and $\sigma > T^2/3$, respectively. The effective potential increases very steeply at small values of $\sigma$. Predictions for several observables, derived from the ordinary and the gauge invariant effective potential, are compared. Good agreement is found for the critical temperature and the jump in the order parameter. The results for the latent heat differ significantly for large Higgs masses.

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