Hindmarsh , M , Rummukainen , K & Weir , D J 2017 , ' Numerical simulations of necklaces in SU(2) gauge-Higgs field theory ' , Physical Review D , vol. 95 , no. 6 , 063520 . https://doi.org/10.1103/PhysRevD.95.063520
Title: | Numerical simulations of necklaces in SU(2) gauge-Higgs field theory |
Author: | Hindmarsh, Mark; Rummukainen, Kari; Weir, David J. |
Contributor organization: | Department of Physics Helsinki Institute of Physics |
Date: | 2017-03-24 |
Language: | eng |
Number of pages: | 14 |
Belongs to series: | Physical Review D |
ISSN: | 2470-0010 |
DOI: | https://doi.org/10.1103/PhysRevD.95.063520 |
URI: | http://hdl.handle.net/10138/310137 |
Abstract: | We perform the first numerical simulations of necklaces in a non-Abelian gauge theory. Necklaces are composite classical solutions which can be interpreted as monopoles trapped on strings, rather generic structures in a Grand Unified Theory. We generate necklaces from random initial conditions, modeling a phase transition in the early Universe, and study the evolution. For all cases, we find that the necklace system shows scaling behavior similar to that of a network of ordinary cosmic strings. Furthermore, our simulations indicate that comoving distance between the monopoles or semipoles along the string asymptotes to a constant value at late times. This means that, while the monopole-to-string energy density ratio decreases as the inverse of the scale factor, a horizon-size length of string has a large number of monopoles, significantly affecting the dynamics of string loops. We argue that gravitational wave bounds from millisecond pulsar timing on the string tension in the Nambu-Goto scenario are greatly relaxed. |
Subject: |
ELECTRICALLY CHARGED VORTICES
COSMIC NECKLACES STRINGS NETWORKS DYNAMICS LIMITS 114 Physical sciences |
Peer reviewed: | Yes |
Usage restriction: | openAccess |
Self-archived version: | publishedVersion |
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