Axions pp 19-50 | Cite as

Axion Cosmology

  • Pierre Sikivie
Part of the Lecture Notes in Physics book series (LNP, volume 741)


The cosmological properties of axions are reviewed. We discuss the axions produced by thermal processes in the early universe, the evolution of the average axion field between the Peccei-Quinn and QCD phase-transitions, the domain-wall problem and its possible resolutions, the population of cold axions produced by vacuum realignment, string decay and domain wall decay, and, finally, axion miniclusters and axion isocurvature perturbations.


Domain Wall Velocity Dispersion Axion String Reheat Temperature Axion Decay Constant 
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© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Pierre Sikivie
    • 1
    • 2
  1. 1.Department of PhysicsUniversity of FloridaGainesvilleUSA
  2. 2.Theoretical Physics DivisionCERN CH-1211Genéve 23Switzerland

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