## Electroweak Physics and the Early UniverseElectroweak Phase Transition and the Early Universe, a NATO Advanced Re search Workshop, was held March 23-25, 1994, at the Hotel Tivoli in Sintra, Portugal. The meeting was co-sponsored by three other Lisbon-based institutions: the Fundac;ao Gulbenkian, J. N.!. C. T. (Junta Nacional para Investigac;ao Cientifica e Tecnologica) and G. T. A. E. (Grupo Teorico de Alta Energias). The workshop brought together a large number of theoretical physicists who are actively researching topics relevant to the understanding of the standard model of electroweak interactions in the early universe. We were pleased and overwhelmed by the positive, and sometimes instan taneous response that our enterprise raised right from its inception. The old town of Sintra provided a serene and pleasant environment for the par ticipants. Some heated and controversial discussions on many unanswered questions in the standard model took place throughout the three days of the workshop. If one consensus emerged from the meeting, it was the imperative need for non-perturbative techniques for the understanding of the electroweak phase transition. |

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### Contents

Dynamical Evolution of the Electroweak Phase Transition | 19 |

J Kapusta | 54 |

On the Strength of First Order Phase Transitions | 63 |

Copyright | |

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action approach approximation assume baryon becomes boson boundary bubble calculation charge classical complex compute configuration consider constant contribution corrections correlation corresponding coupling defined density dependence derivative described determined discussed dynamics Early Universe effective potential electroweak electroweak phase transition energy equation equilibrium evolution expansion expect factor fermions field Figure final finite fixed fluctuations function gauge gauge field given gives Higgs Higgs field high temperature initial instability integral interesting lattice leading length Lett limit loop magnetic field mass mechanism modes Nucl nucleation obtained parameter particles perturbation perturbation theory phase transition Phys Physics possible preprint present problem processes produced REFERENCES region renormalization requires scalar scale scattering solution space sphaleron standard model string symmetry temperature theory thermal vacuum violation volume wall wave zero