Recombination of the primeval plasma and light -inos

Details Recombination of the primeval plasma and light -inos Recombination of the primeval plasma and light -inos

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984phlb..144...61s&link_type=abstract

Physics Letters B, Volume 144, Issue 1-2, p. 61-68.

Physics

17

Scientific paper

The recombination of neutral hydrogen in the early universe is reinvestigated taking into account light neutral fermions, stable or radiatively unstable. When these fermions are stable, their main effect is to increase the expansion rate of the universe, and to increase the fossilized ionization xe of matter. Big bang nucleo-synthesis provides density constraints on the baryonic components and if we assume that the universe is closed with light neutral fermions, we can set limits upon xe:4×10-4photon+gravitino exhibits the good relation between the photino lifetime and the ionizing photon energy.

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