Cosmological constraints on pseudo-Nambu-Goldstone bosons

Technical Report · Sun Sep 01 00:00:00 EDT 1991

OSTI ID:5874998

Frieman, J A; Jaffe, A H

Particle physics models with pseudo-Nambu-Goldstone bosons (PNGBs) are characterized by two mass scales: a global spontaneous symmetry breaking scale, f, and a soft (explicit) symmetry breaking scale, Lambda. General model insensitive constraints were studied on this 2-D parameter space arising from the cosmological and astrophysical effects of PNGBs. In particular, constraints were studied arising from vacuum misalignment and thermal production of PNGBs, topological defects, and the cosmological effects of PNGB decay products, as well as astrophysical constraints from stellar PNGB emission. Bounds on the Peccei-Quinn axion scale, 10{sup 10} GeV approx. = or less than f{sub pq} approx. = or less than 10{sup 10} to 10{sup 12} GeV, emerge as a special case, where the soft breaking scale is fixed at Lambda sub QCD approx. = 100 MeV.

• Research Organization: Fermi National Accelerator Lab., Batavia, IL (United States)
• OSTI ID: 5874998
• Report Number(s): N-92-11943; NASA-CR-189010; NAS-1.26:189010; FERMILAB-PUB-91/240-A; CNN: NAGW-1340
• Country of Publication: United States
• Language: English

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THEORETICAL DATA
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