On the Nature of the Magnetic Fields Generated During the Electroweak Phase Transition

Details On the Nature of the Magnetic Fields Generated During the Electroweak Phase Transition On the Nature of the Magnetic Fields Generated During the Electroweak Phase Transition

1997-07-07

arxiv.org/abs/hep-ph/9707265v2

Phys.Lett. B418 (1998) 258-265

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, LaTeX file. Final version, with new comments and refs., accepted for publication on Physics Letter B

Scientific paper

10.1016/S0370-2693(97)01224-0

In this Letter we reanalyse the question of the origin of magnetic fields during the electroweak phase transition. We show that their formation is intimately connected to some semiclassical configurations of the gauge fields, such as electroweak Z-strings and W-condensates. We describe the formation of these semiclassical configurations during a first order phase transition and argue that they might be generated also in the case of a second order phase transition. We suggest that the instability of electroweak strings does not imply the disappereance of the embedded magnetic field.

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