Ruling out a critical density baryonic universe

Details Ruling out a critical density baryonic universe Ruling out a critical density baryonic universe

1997-05-15

arxiv.org/abs/hep-ph/9705331v1

Phys.Lett.B408:59-68,1997

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages incl. 8 eps figures, REVTEX

Scientific paper

10.1016/S0370-2693(97)00833-2

It has been suggested by Bartlett and Hall that our universe may have the critical density in baryons by virtue of specific interactions with a `shadow' world. We show that this possibility is severely constrained by primordial nucleosynthesis, stellar evolution and the thermalization of the cosmic microwave background. In particular, recent observations of small angular-scale anisotropy in the cosmic microwave background conclusively rule out all such baryon-dominated cosmologies.

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