Gravitinos as the dark matter on all scales

Details Gravitinos as the dark matter on all scales Gravitinos as the dark matter on all scales

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phlb..173..120f&link_type=abstract

Physics Letters B, Volume 173, Issue 2, p. 120-125.

Physics

3

Scientific paper

If the universe experienced inflation in the early epoch, the number density of the gravitinos is much suppressed. Then gravitinos with a mass of a few hundred keV-100 MeV can be the dark matter on all scales, from spheroidal galaxies to super clusters. It is also discussed that the decay of gravitinos with a mass >~ 100 MeV into an axion and an axino will explain why the observed values of the cosmological density parameter are discrepant from unity.

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