Cosmology of the gravitino as the lightest supersymmetric particle

Details Cosmology of the gravitino as the lightest supersymmetric particle Cosmology of the gravitino as the lightest supersymmetric particle

May 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phlb..261...71b&link_type=abstract

Physics Letters B, Volume 261, Issue 1-2, p. 71-75.

Physics

26

Scientific paper

The cosmological consequences of the gravitino as the lightest supersymmetric particle are considered. It is shown that the gravitino can be a dark matter particle if the second lightest supersymmetric particle is the sneutrino. The gravitino can decay due to R-parity violation process. The most stringent lower limit on the gravitino lifetime is imposed by the diffuse gamma-ray flux and the positron flux in our Galaxy. The two-particle decay of the gravitino, G-->γ+X and G-->ν+X, can produce a detectable gamma line and a marginally detectable neutrino line.

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