A detailed study of the stability of vortons

Richard Battye (Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of Manchester, Upper Brook Street, Manchester, UK) ; Steven Cotterill (Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of Manchester, Upper Brook Street, Manchester, UK) ; Jonathan Pearson (Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, University of Manchester, Upper Brook Street, Manchester, UK)

We construct and simulate the dynamics of gauged vortons — circular loops of cosmic string supported by the angular momentum of trapped charge and current and provide additional details on the fully stable vorton that we have previously presented. We find that their existence and dynamical properties can be accurately predicted by an analysis based on infinite, straight superconducting strings if an additional constraint on their phase frequency is satisfied. We show a good quantitative agreement with the thin string approximation (TSA) and provide evidence that curvature corrections are inversely proportional to the vorton radius. This is verified with an energy minimisation algorithm that produces vorton solutions and subsequent axial and full three dimensional evolution codes. We find that we can predict the frequencies of each mode of oscillation, determine which modes are unstable and calculate the growth rate of the unstable modes to a high degree of accuracy.

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Published on:
01 April 2022
Publisher:
Springer
Published in:
Journal of High Energy Physics , Volume 2022 (2022)
Issue 4
Pages 1-50
DOI:
https://doi.org/10.1007/JHEP04(2022)005
arXiv:
2112.08066
Copyrights:
The Author(s)
Licence:
CC-BY-4.0

Fulltext files: