Late Time Cosmological Phase Transitions 1: Particle Physics Models and Cosmic Evolution

By: Nasa, National Aeronautics and Space Adm

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...

• Format: Paperback
• Language: English
• ISBN: 1729305253
• ISBN13: 9781729305256
• Release Date: January 1
• Publisher: Independently Published
• Length: 44 Pages
• Weight: 0.28 lbs.
• Dimensions: 0.1" x 8.5" x 11.0"