Influence of the electric coupling strength in current-carrying cosmic strings

Details Influence of the electric coupling strength in current-carrying cosmic strings Influence of the electric coupling strength in current-carrying cosmic strings

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phrvd..46.3335p&link_type=abstract

Physical Review D (Particles, Fields, Gravitation, and Cosmology), Volume 46, Issue 8, 15 October 1992, pp.3335-3349

Physics

38

Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

The fully coupled Witten model for superconducting cosmic strings is analyzed in detail, with special emphasis on the effects due to a nonzero value of the electromagnetic coupling constant in order to check the accuracy of the neutral-limit treatment of the equation of state. Qualitative differences for the influence of the coupling constant between timelike and spacelike situations are examined in order to obtain a new understanding of the mechanical (as opposed to electromagnetic) properties of a cosmic string. Longitudinal- and transverse-perturbation velocities are estimated and related to stability criteria. It transpires that superconducting cosmic-string loops are generally not strictly stable against nonaxisymmetric perturbations.

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