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Big bang nucleosynthesis and the quark-hadron transitionAn examination and brief review is made of the effects of quark-hadron transition induced fluctuations on Big Bang nucleosynthesis. It is shown that cosmologically critical densities in baryons are difficult to reconcile with observation, but the traditional baryon density constraints from homogeneous calculations might be loosened by as much as 50 percent, to 0.3 of critical density, and the limit on the number of neutrino flavors remains about N(sub nu) is less than or approximately 4. To achieve baryon densities of greater than or approximately 0.3 of critical density would require initial density contrasts R is much greater the 10(exp e), whereas the simplest models for the transition seem to restrict R to less than of approximately 10(exp 2).
Document ID
19900044352
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Kurki-Suonio, Hannu (Drexel University Philadelphia, PA, United States)
Matzner, Richard A. (Texas, University Austin, United States)
Olive, Keith A. (Minnesota, University Minneapolis, United States)
Schramm, David N. (NASAFermilab Astrophysics Center Batavia; Chicago, University, IL, United States)
Date Acquired
August 14, 2013
Publication Date
April 20, 1990
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 353
ISSN: 0004-637X
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NSF PHY-88-06567
CONTRACT_GRANT: DE-AC02-83ER-40105
Distribution Limits
Public
Copyright
Other