Aspects of the cosmological electroweak phase transition.

Details Aspects of the cosmological electroweak phase transition. Aspects of the cosmological electroweak phase transition.

Nov 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993acep.book.....b&link_type=abstract

Aspects of the cosmological electroweak phase transition., by Bödeker, D.; Buchmüller, W.; Fodor, Z.; Helbig, T.. Deutsches Ele

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The authors study the decay of the metastable symmetric phase in the standard model at finite temperature. For the SU(2)-Higgs model the two wave function correction terms Zφ(φ2,T) and Zχ(φ2,T) of Higgs and Goldstone boson fields are calculated to one-loop order. They find that the derivative expansion of the effective action is reliable for Higgs masses smaller than the W-boson mass. They propose a new procedure to evaluate the decay rate by first integrating out the vector field and the components of the scalar fields with non-zero Matsubara frequencies. The course of the cosmological electroweak phase transition is evaluated numerically for different Higgs boson masses and non-vanishing magnetic mass of the gauge boson. For Higgs masses above ≡60 GeV the latent heat can reheat the system to the critical temperature, which qualitatively changes the nature of the transition.

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