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Type I Abelian Higgs strings: evolution and cosmic microwave background constraints
journal contribution
posted on 2023-06-09, 18:16 authored by Mark HindmarshMark Hindmarsh, Joanes Lizarraga, Jon Urrestilla, David Daverio, Martin KunzWe present results from the first simulations of networks of Type I Abelian Higgs cosmic strings to include both matter and radiation eras and Cosmic Microwave Background (CMB) constraints. In Type I strings, the string tension is a slowly decreasing function of the ratio of the scalar and gauge mass-squared,ß. We find that the mean string separation shows no dependence on ß, and that the energy-momentum tensor correlators decrease approximately in proportion to the square of the string tension, with additional O(1) correction factors which asymptote to constants below ß?0.01. Strings in models with low self-couplings can therefore satisfy current CMB bounds at higher symmetry-breaking scales. This is particularly relevant for models where the gauge symmetry is broken in a supersymmetric flat direction, for which the effective self-coupling can be extremely small. If our results can be extrapolated to ß?10-15,even strings formed at 10-16 GeV (approximately the grand unification scale in supersymmetric extensions of the Standard Model) can be compatible with CMB constraints.
Funding
South-Eastern Particle Theory Alliance Sussex - RHUL - UCL 2017-2020 - Sussex node; G2074; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/P000819/1
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Publication status
- Published
File Version
- Published version
Journal
Physical Review DISSN
2470-0010Publisher
American Physical SocietyExternal DOI
Issue
8Volume
99Page range
083522-1-12Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Theoretical Particle Physics Research Group Publications
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- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2019-07-02First Open Access (FOA) Date
2019-07-02First Compliant Deposit (FCD) Date
2019-07-01Usage metrics
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