Late Time Cosmological Phase Transitions 1: Particle Physics Models and Cosmic Evolution
- ISBN-10
- 1729305253
- ISBN-13
- 9781729305256
- Category
- Science
- Pages
- 44
- Language
- English
- Published
- 2018-10-26
- Publisher
- Independently Published
- Author
- National Aeronautics and Space Adm Nasa
Description
We 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. Frieman, Joshua A. and Hill, Christopher T. and Watkins, Richard Unspecified Center NAGW-1340
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Other editions
-
- 2018-07-05
- 42 pages
- Paperback
- Createspace Independent Publishing Platform
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