Cosmic strings in hidden sectors: 2. Cosmological and astrophysical signatures

Andrew J. Long, Tanmay Vachaspati

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


Cosmic strings can arise in hidden sector models with a spontaneously broken Abelian symmetry group. We have studied the couplings of the Standard Model fields to these so-called dark strings in the companion paper. Here we survey the cosmological and astrophysical observables that could be associated with the presence of dark strings in our universe with an emphasis on low-scale models, perhaps TeV. Specifiocally, we consider constraints from nucleosynthesis and CMB spectral distortions, and we calculate the predicted fluxes of diffuse gamma ray cascade photons and cosmic rays. For strings as light as TeV, we find that the predicted level of these signatures is well below the sensitivity of the current experiments, and therefore low scale cosmic strings in hidden sectors remain unconstrained. Heavier strings with a mass scale in the range 1013 GeV to 1015 GeV are at tension with nucleosynthesis constraints.

Original languageEnglish (US)
Article number040
JournalJournal of Cosmology and Astroparticle Physics
Issue number12
StatePublished - Dec 18 2014


  • Big bang nucleosynthesis
  • Cosmic strings
  • Domain walls
  • Gamma ray theory
  • Monopoles
  • Ultra high energy cosmic rays

ASJC Scopus subject areas

  • Astronomy and Astrophysics


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