445 K 10 pp. | ||

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Title | Inflationary Axion Cosmology | |

Author(s) | Wilczek, Frank; Turner, Michael S. | |

Publication Date | September 1990 | |

Report Number | FERMILAB-Pub-90/198-A | |

Unique Identifier | ACC0086 | |

Other Numbers | OSTI ID: 6099352 | |

Research Org | Fermi National Accelerator Laboratory; Enrico Fermi Institute, The University of Chicago; Institute for Advanced Study, School of Natural Sciences, Princeton, New Jersey | |

Contract No | US Department of Energy (DOE) | |

Subject | 640106 -- Astrophysics & Cosmology-- Cosmology ; 645103 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties; Axions-- Mass; Cosmology-- Axions; Inflationary Universe; Goldstone Bosons; Limiting Values; Phase Transformations; Quantum Chromodynamics; Scalar Fields; Symmetry Breaking | |

Keywords | Bosons; Cosmological Models; Elementary Particles; Field Theories; Goldstone Bosons; Mathematical Models; Postulated Particles; Quantum Field Theory | |

Related Web Pages | Frank Wilczek, Asymptotic Freedom, and Strong Interaction | |

Abstract | If Peccei-Quinn (PQ) symmetry is broken after inflation, the initial axion angle is a random variable on cosmological scales; based on this fact, estimates of the relic-axion mass density give too large a value if the axion mass is less than about 10-6 eV. This bound can be evaded if the Universe underwent inflation after PQ symmetry breaking and if the observable Universe happens to be a region where the initial axion angle was atypically small, .1 . (ma/10-6eV)0.59. We show consideration of fluctuations induced during inflation severely constrains the latter alternative. | |

445 K 10 pp. | ||

View Document | ||