Late time cosmological phase transitions 1: Particle physics models and cosmic evolution

Details Late time cosmological phase transitions 1: Particle physics models and cosmic evolution Late time cosmological phase transitions 1: Particle physics models and cosmic evolution

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991stin...9217696f&link_type=abstract

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Mathematics

Logic

Anisotropy, Astronomical Models, Background Radiation, Bosons, Cosmology, Dark Matter, Galactic Evolution, Microwaves, Phase Transformations, Universe, Compton Effect, Domain Wall, Mathematical Models, Spectral Signatures

Scientific paper

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, omegaphi approx. = 1.

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