Topological Defects with Non-Symmetric Core

Details Topological Defects with Non-Symmetric Core Topological Defects with Non-Symmetric Core

1997-02-03

arxiv.org/abs/hep-ph/9702221v1

Phys.Rev. D56 (1997) 1973-1981

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages including 7 embedded postscript figures, use latex, no style files needed. Submitted to Phys. Rev. D

Scientific paper

10.1103/PhysRevD.56.1973

We demonstrate that field theories involving explicit breaking of continous symmetries, incorporate two generic classes of topological defects each of which is stable for a particular range of parameters. The first class includes defects of the usual type where the symmetry gets restored in the core and vacuum energy gets trapped there. We show however that these defect solutions become unstable for certain ranges of parameters and decay not to the vacuum but to another type of stable defect where the symmetry in not restored in the core. In the wall case, initially spherical, bubble-like configurations are simulated numerically and shown to evolve generically towards a planar collapse. In the string case, the decay of the symmetric core vortex resembles the decay of a semilocal string to a skyrmion with the important difference that while the skyrmion is unstable and decays to the vacuum, the resulting non-symmetric vortex is topologically stable.

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