Late-time cosmological phase transitions: Particle-physics models and cosmic evolution | Zendy

J. Frieman | Zendy; Christopher T. Hill | Zendy; Richard Watkins | Zendy

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

Author(s) -

J. Frieman,

Christopher T. Hill,

Richard Watkins

Publication year - 1992

Publication title -

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

Language(s) - English

Resource type - Journals

eISSN - 1089-4918

pISSN - 0556-2821

DOI - 10.1103/physrevd.46.1226

Subject(s) - physics , cosmic microwave background , universe , particle physics , phase transition , big bang (financial markets) , boson , dark matter , anisotropy , physics beyond the standard model , goldstone boson , astrophysics , quantum mechanics , finance , economics

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.

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