Stability of string defects in models of non-Abelian symmetry breaking

Details Stability of string defects in models of non-Abelian symmetry breaking Stability of string defects in models of non-Abelian symmetry breaking

1998-07-09

arxiv.org/abs/hep-th/9807068v3

Phys.Rev. D59 (1999) 065017

Physics

High Energy Physics

High Energy Physics - Theory

15 pages, revtex, with 8 figures. Submitted to PRD

Scientific paper

10.1103/PhysRevD.59.065017

In this paper we describe a new type of topological defect, called a homilia string, which is stabilized via interactions with the string network. Using analytical and numerical techniques, we investigate the stability and dynamics of homilia strings, and show that they can form stable electroweak strings. In SU(2)xU(1) models of symmetry breaking the intersection of two homilia strings is identified with a sphaleron. Due to repulsive forces, the homilia strings seperate, resulting in sphaleron annihilation. It is shown that electroweak homilia string loops cannot stabilize as vortons, which circumvents the adverse cosmological problems associated with stable loops. The consequences for GUT scale homilia strings are also discussed.

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