Dynamical Stability of Witten Rings

Details Dynamical Stability of Witten Rings Dynamical Stability of Witten Rings

1994-05-04

arxiv.org/abs/hep-ph/9405220v1

Phys.Rev. D51 (1995) 4092-4098

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, LaTeX-ReVTeX (v.3), 2 figures available upon request, DAMTP R-94/19

Scientific paper

10.1103/PhysRevD.51.4092

The dynamical stability of cosmic rings, or vortons, is investigated for the particular equation of state given by the Witten bosonic model. It is found that there exists a finite range of the state parameter for which the vorton states are actually stable against dynamical perturbations. Inclusion of the electromagnetic self action into the equation of state slightly shrinks the stability region but otherwise yields no qualitative difference. If the Witten bosonic model represents a good approximation for more realistic string models, then the cosmological vorton excess problem can only be solved by assuming either that strings are formed at low energy scales or that some quantum instability may develop at a sufficient rate.

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