Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-08-18
Phys.Rev. D61 (2000) 043502
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, 7 figures, replaced with typos corrected and reference added. To appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.61.043502
In cosmological first-order phase transitions, the progress of true-vacuum bubbles is expected to be significantly retarded by the interaction between the bubble wall and the hot plasma. We examine the evolution and collision of slow-moving true-vacuum bubbles. Our lattice simulations indicate that phase oscillations, predicted and observed in systems with a local symmetry and with a global symmetry where the bubbles move at speeds less than the speed of light, do not occur inside collisions of slow-moving local-symmetry bubbles. We observe almost instantaneous phase equilibration which would lead to a decrease in the expected initial defect density, or possibly prevent defects from forming at all. We illustrate our findings with an example of defect formation suppressed in slow-moving bubbles. Slow-moving bubble walls also prevent the formation of `extra defects', and in the presence of plasma conductivity may lead to an increase in the magnitude of any primordial magnetic field formed.
Davis Anne--Christine
Lilley Matthew
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