Gravitino mass bounds in a general cosmological scenario

Details Gravitino mass bounds in a general cosmological scenario Gravitino mass bounds in a general cosmological scenario

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phla..160...36r&link_type=abstract

Physics Letters A, Volume 160, Issue 1, p. 36-40.

Physics

Scientific paper

A stable gravitino is shown to respect an upper mass bound ~1 keV and an unstable one a lower mass bound ~10 TeV from the global hyperbolicity property alone without the assumptions of a Friedmann universe. The specific Friedmann cosmology with a critical mass density in fact reduces the upper bound for a stable gravitino to ~0.1 keV. Complications due to inflation and the anti-de Sitter nature of the spacetime before the breakdown of local supersymmetry are also discussed.

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