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Axion Cosmology

2008; Springer Science+Business Media; Linguagem: Inglês

10.1007/978-3-540-73518-2_2

1616-6361

P. Sikivie,

Particle physics theoretical and experimental studies

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.