Closed baryonic Universe from photon cooling

Details Closed baryonic Universe from photon cooling Closed baryonic Universe from photon cooling

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvl..66..541b&link_type=abstract

Physical Review Letters (ISSN 0031-9007), vol. 66, Feb. 4, 1991, p. 541-544. Research supported by NASA and University of Califo

Physics

14

Baryons, Big Bang Cosmology, Nuclear Fusion, Photons, Universe, Hubble Constant, Light Elements, Particle Mass

Scientific paper

The Universe may be critically closed by baryons and not conflict with standard big-bang nucleosynthesis if the comoving number density of photons is reduced after nucleosynthesis. This is accomplished at a temperature of order 10 keV by recoupling the photons to a cold hidden sector via a photon-mixing mechanism. Signatures from supernovae, neutrino backgrounds, and nucleosynthesis are discussed.

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