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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{sup {minus}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, {theta}{sub 1}{approx lt}({ital m}{sub {ital a}}/10{sup {minus}6} eV{sup 0.59}.) We show consideration of fluctuations induced during inflation severely constrains the latter alternative.
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| Authors: |
Turner, M.S. (NASA/Fermilab Astrophysics Center, Fermi National Accelerator Laboratory, Batavia, Illinois 60510-0500 an (US) Departments of Physics and Astronomy Astrophysics, Enrico Fermi Institute, The University of Chicago, Chicago, IL (USA));
Wilczek, F. (Institute for Advanced Study, School of Natural Sciences, Princeton, New Jersey (USA))
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| Publication Date: | 1991 Jan 07 |
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| OSTI Identifier: | 6099352 |
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| Resource Type: | Journal Article |
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| Resource Relation: | Journal Name: Physical Review Letters; (USA); Journal Volume: 66:1 |
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| Country of Publication: | United States |
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| Language: | English |
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| Format: | Size: Pages: 5-8 |
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| Other Number(s): | Journal ID: ISSN 0031-9007; CODEN: PRLTA |
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| Subject: | 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AXIONS; MASS; COSMOLOGY; INFLATIONARY UNIVERSE; GOLDSTONE BOSONS; LIMITING VALUES; PHASE TRANSFORMATIONS; QUANTUM CHROMODYNAMICS; SCALAR FIELDS; SYMMETRY BREAKING; BOSONS; COSMOLOGICAL MODELS; ELEMENTARY PARTICLES; FIELD THEORIES; MATHEMATICAL MODELS; POSTULATED PARTICLES; QUANTUM FIELD THEORY |
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| Update Date: | 2009 Dec 17 |
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