Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2000-09-11
Phys.Rev. D63 (2001) 045002
Physics
High Energy Physics
High Energy Physics - Phenomenology
48 pages, including 16 figures. Minor revisions and typo fixes, nothing substantial, conclusions essentially unchanged
Scientific paper
10.1103/PhysRevD.63.045002
We present a lattice method to compute bubble nucleation rates at radiatively induced first order phase transitions, in high temperature, weakly coupled field theories, nonperturbatively. A generalization of Langer's approach, it makes no recourse to saddle point expansions and includes completely the dynamical prefactor. We test the technique by applying it to the electroweak phase transition in the minimal standard model, at an unphysically small Higgs mass which gives a reasonably strong phase transition (lambda/g^2 =0.036, which corresponds to m(Higgs)/m(W) = 0.54 at tree level but does not correspond to a positive physical Higgs mass when radiative effects of the top quark are included), and compare the results to older perturbative and other estimates. While two loop perturbation theory slightly under-estimates the strength of the transition measured by the latent heat, it over-estimates the amount of supercooling by a factor of 2.
Moore Guy D.
Rummukainen Kari
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