Semilocal Cosmic String Networks

Abstract

We report on a large scale numerical study of networks of semilocal cosmic strings in flat space in the parameter regime in which they are perturbatively stable. We find a population of segments with an exponential length distribution and indications of a scaling network without significant loop formation. Very deep in the stability regime strings of superhorizon size grow rapidly and ``percolate'' through the box. We believe these should lead at late times to a population of infinite strings similar to topologically stable strings. However, the strings are very light; scalar gradients dominate the energy density and the network has thus a global texture-like signature. As a result, the observational constraints, at least from the temperature power spectrum of the CMB, on models predicting semilocal strings, should be closer to those on global textures or monopoles, rather than on topologically stable gauged cosmic strings.

5 pages, 3 figures; extended discussion about initial conditions; matches published version

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Cited by in corpus (24)

• CMB power spectra from cosmic strings: predictions for the Planck satellite and beyond
• CMB polarization power spectra contributions from a network of cosmic strings
• Evolution of cosmic superstring networks: a numerical simulation
• Cosmic microwave anisotropies from BPS semilocal strings
• Low-cost fermions in classical field simulations
• Detecting and distinguishing topological defects in future data from the CMBPol satellite
• SO and USp Kahler and Hyper-Kahler Quotients and Lumps
• Evolution of local and global monopole networks
• Renormalised nonequilibrium quantum field theory: scalar fields
• Semiclassical decay of topological defects
• Evolution of Semilocal String Networks: I. Large-scale Properties
• Measuring Global Monopole Velocities, one by one
• Analytic Models for the Evolution of Semilocal String Networks
• Evolution of Cosmic Necklaces and Lattices
• Textures and Semi-Local Strings in SUSY Hybrid Inflation
• Evolution of Hybrid Defect Networks
• Scaling in necklaces of monopoles and semipoles
• Evolution of Semilocal String Networks: II. Velocity estimators
• Can type II Semi-local cosmic strings form?
• Gravitating Semilocal strings
• Cosmological Evolution of Semilocal String Networks
• Emission of Nambu-Goldstone bosons from the semilocal string network
• Calibrating Analytical Models for Semilocal Strings
• Metastable cosmic strings are broken at the start