Axion cold dark matter in nonstandard cosmologies

Journal Article · Mon Mar 15 04:00:00 EDT 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.81.063508· OSTI ID:21409375

Visinelli, Luca; Gondolo, Paolo ^[1]

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1. Department of Physics and Astronomy, University of Utah, 115 South 1400 East 201, Salt Lake City, Utah 84112-0830 (United States)

We study the parameter space of cold dark matter axions in two cosmological scenarios with nonstandard thermal histories before big bang nucleosynthesis: the low-temperature reheating (LTR) cosmology and the kination cosmology. If the Peccei-Quinn symmetry breaks during inflation, we find more allowed parameter space in the LTR cosmology than in the standard cosmology and less in the kination cosmology. On the contrary, if the Peccei-Quinn symmetry breaks after inflation, the Peccei-Quinn scale is orders of magnitude higher than standard in the LTR cosmology and lower in the kination cosmology. We show that the axion velocity dispersion may be used to distinguish some of these nonstandard cosmologies. Thus, axion cold dark matter may be a good probe of the history of the Universe before big bang nucleosynthesis.

• OSTI ID: 21409375
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 6 Vol. 81; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
79 ASTRONOMY AND ASTROPHYSICS
AXIONS
BOSONS
COSMOLOGICAL MODELS
COSMOLOGY
DISPERSIONS
ELEMENTARY PARTICLES
GOLDSTONE BOSONS
INFLATIONARY UNIVERSE
MATHEMATICAL MODELS
MATTER
NONLUMINOUS MATTER
NUCLEOSYNTHESIS
POSTULATED PARTICLES
SPACE
SYMMETRY
SYMMETRY BREAKING
SYNTHESIS
UNIVERSE
VELOCITY