Evolution of semilocal string networks: II. Velocity estimators

Lopez-Eiguren, A. and Urrestilla, J. and Achúcarro, A. and Avgoustidis, Anastasios and Martins, C.J.A.P. (2017) Evolution of semilocal string networks: II. Velocity estimators. Physical Review D, 96 . 023526/1-023526/20. ISSN 2470-0029

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Abstract

We continue a comprehensive numerical study of semilocal string networks and their cosmological evolution. These can be thought of as hybrid networks comprised of (non-topological) string segments, whose core structure is similar to that of Abelian Higgs vortices, and whose ends have long--range interactions and behaviour similar to that of global monopoles. Our study provides further evidence of a linear scaling regime, already reported in previous studies, for the typical length scale and velocity of the network. We introduce a new algorithm to identify the position of the segment cores. This allows us to determine the length and velocity of each individual segment and follow their evolution in time. We study the statistical distribution of segment lengths and velocities for radiation- and matter-dominated evolution in the regime where the strings are stable. Our segment detection algorithm gives higher length values than previous studies based on indirect detection methods. The statistical distribution shows no evidence of (anti)correlation between the speed and the length of the segments.

Item Type: Article
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: 10.1103/PhysRevD.96.023526
Depositing User: Avgoustidis, Anastasios
Date Deposited: 08 Jun 2017 12:55
Last Modified: 21 Sep 2017 17:04
URI: http://eprints.nottingham.ac.uk/id/eprint/43460

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