%0 Journal Article
%T Ruling out a critical density baryonic universe
%A Michael Birkel
%A Subir Sarkar
%J Physics
%D 1997
%I arXiv
%R 10.1016/S0370-2693(97)00833-2
%X 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.
%U http://arxiv.org/abs/hep-ph/9705331v1