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Title: Axion Bounds from Precision Cosmology

Abstract

Depending on their mass, axions produced in the early universe can leave different imprints in cosmic structures. If axions have masses in the eV-range, they contribute a hot dark matter fraction, allowing one to constrain m{sub a} in analogy to neutrinos. In the more favored scenario where axions play the role of cold dark matter and if reheating after inflation does not restore the Peccei-Quinn symmetry, the axion field provides isocurvature fluctuations that are severely constrained by precision cosmology. There remains a small sliver in parameter space where isocurvature fluctuations could still show up in future probes.

Authors:
 [1]; ;  [2];  [3];  [4]
  1. Max-Planck-Institut fuer Physik (Werner-Heisenberg-Institut), 80805 Muenchen (Germany)
  2. Department of Physics and Astronomy, University of Aarhus, 8000 Aarhus C (Denmark)
  3. II. Institut fuer Theoretische Physik, Universitaet Hamburg, 22761 Hamburg (Germany)
  4. Institut fuer Theoretische Teilchenphysik und Kosmologie, RWTH Aachen, 52056 Aachen (Germany)
Publication Date:
OSTI Identifier:
21426573
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1274; Journal Issue: 1; Conference: AXIONS 2010: International conference on the cosmology, astrophysics and particle physics of the axion and the results of recent searches for this hypothetical particle, Gainesville, FL (United States), 15-18 Jan 2010; Other Information: DOI: 10.1063/1.3489559; (c) 2010 American Institute of Physics
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCURACY; AXIONS; COSMOLOGY; EV RANGE; FLUCTUATIONS; INFLATIONARY UNIVERSE; MONTE CARLO METHOD; NEUTRINOS; NONLUMINOUS MATTER; REST MASS; SYMMETRY; UNIVERSE; BOSONS; CALCULATION METHODS; COSMOLOGICAL MODELS; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GOLDSTONE BOSONS; LEPTONS; MASS; MASSLESS PARTICLES; MATHEMATICAL MODELS; MATTER; POSTULATED PARTICLES; VARIATIONS

Citation Formats

Raffelt, G. G., Hamann, J., Hannestad, S., Mirizzi, A., and Wong, Y. Y. Y.. Axion Bounds from Precision Cosmology. United States: N. p., 2010. Web. doi:10.1063/1.3489559.
Raffelt, G. G., Hamann, J., Hannestad, S., Mirizzi, A., & Wong, Y. Y. Y.. Axion Bounds from Precision Cosmology. United States. doi:10.1063/1.3489559.
Raffelt, G. G., Hamann, J., Hannestad, S., Mirizzi, A., and Wong, Y. Y. Y.. Mon . "Axion Bounds from Precision Cosmology". United States. doi:10.1063/1.3489559.
@article{osti_21426573,
title = {Axion Bounds from Precision Cosmology},
author = {Raffelt, G. G. and Hamann, J. and Hannestad, S. and Mirizzi, A. and Wong, Y. Y. Y.},
abstractNote = {Depending on their mass, axions produced in the early universe can leave different imprints in cosmic structures. If axions have masses in the eV-range, they contribute a hot dark matter fraction, allowing one to constrain m{sub a} in analogy to neutrinos. In the more favored scenario where axions play the role of cold dark matter and if reheating after inflation does not restore the Peccei-Quinn symmetry, the axion field provides isocurvature fluctuations that are severely constrained by precision cosmology. There remains a small sliver in parameter space where isocurvature fluctuations could still show up in future probes.},
doi = {10.1063/1.3489559},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1274,
place = {United States},
year = {Mon Aug 30 00:00:00 EDT 2010},
month = {Mon Aug 30 00:00:00 EDT 2010}
}