Numerical simulations of string networks in the Abelian-Higgs model

Abstract

We present the results of a field theory simulation of networks of strings in the Abelian Higgs model. Starting from a random initial configuration we show that the resulting vortex tangle approaches a self-similar regime in which the length density of lines of zeros of $\varphi$ reduces as $t^{-2}$. We demonstrate that the network loses energy directly into scalar and gauge radiation. These results support a recent claim that particle production, and not gravitational radiation, is the dominant energy loss mechanism for cosmic strings. This means that cosmic strings in Grand Unified Theories are severely constrained by high energy cosmic ray fluxes: either they are ruled out, or an implausibly small fraction of their energy ends up in quarks and leptons.

4pp RevTeX, 3 eps figures, clarifications and new results included, to be published in Phys. Rev. Lett

References in corpus (1)

• Scaling and Small Scale Structure in Cosmic String Networks

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