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Big bang nucleosynthesis - The standard model and alternativesThe standard homogeneous-isotropic calculation of the big bang cosmological model is reviewed, and alternate models are discussed. The standard model is shown to agree with the light element abundances for He-4, H-2, He-3, and Li-7 that are available. Improved observational data from recent LEP collider and SLC results are discussed. The data agree with the standard model in terms of the number of neutrinos, and provide improved information regarding neutron lifetimes. Alternate models are reviewed which describe different scenarios for decaying matter or quark-hadron induced inhomogeneities. The baryonic density relative to the critical density in the alternate models is similar to that of the standard model when they are made to fit the abundances. This reinforces the conclusion that the baryonic density relative to critical density is about 0.06, and also reinforces the need for both nonbaryonic dark matter and dark baryonic matter.
Document ID
19910052805
Document Type
Reprint (Version printed in journal)
Authors
Schramm, David N. (NASAFermilab Astrophysics Center Batavia; Chicago, University, IL, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Publication Information
Publication: Physica Scripta
Volume: T36
ISSN: 0281-1847
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAGW-1321
CONTRACT_GRANT: NSF AST-88-22595
CONTRACT_GRANT: NAGW-1340
Distribution Limits
Public
Copyright
Other