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Late time cosmological phase transitions 1: Particle physics models and cosmic evolutionWe described a natural particle physics basis for late-time phase transitions in the universe. Such a transition can seed the formation of large-scale structure while leaving a minimal imprint upon the microwave background anisotropy. The key ingredient is an ultra-light pseudo-Nambu-Goldstone boson with an astronomically large (O(kpc-Mpc)) Compton wavelength. We analyze the cosmological signatures of and constraints upon a wide class of scenarios which do not involve domain walls. In addition to seeding structure, coherent ultra-light bosons may also provide unclustered dark matter in a spatially flat universe, omega sub phi approx. = 1.
Document ID
19920008477
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Frieman, Joshua A. (Fermi National Accelerator Lab. Batavia, IL., United States)
Hill, Christopher T. (Fermi National Accelerator Lab. Batavia, IL., United States)
Watkins, Richard (Chicago Univ. IL., United States)
Date Acquired
September 6, 2013
Publication Date
November 1, 1991
Subject Category
Astrophysics
Report/Patent Number
NASA-CR-189857
FERMILAB-PUB-91/324-A
NAS 1.26:189857
Accession Number
92N17696
Funding Number(s)
CONTRACT_GRANT: NAGW-1340
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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