University of Sussex
Browse
__smbhome.uscs.susx.ac.uk_akj23_Documents_SRO 01 07 2.pdf (1.99 MB)

Type I Abelian Higgs strings: evolution and cosmic microwave background constraints

Download (1.99 MB)
journal contribution
posted on 2023-06-09, 18:16 authored by Mark HindmarshMark Hindmarsh, Joanes Lizarraga, Jon Urrestilla, David Daverio, Martin Kunz
We 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

History

Publication status

  • Published

File Version

  • Published version

Journal

Physical Review D

ISSN

2470-0010

Publisher

American Physical Society

Issue

8

Volume

99

Page range

083522-1-12

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Theoretical Particle Physics Research Group Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2019-07-02

First Open Access (FOA) Date

2019-07-02

First Compliant Deposit (FCD) Date

2019-07-01

Usage metrics

    University of Sussex (Publications)

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC