Abstract
The gravitino must be either light enough so that ambient gravitinos would not produce too large a cosmic deceleration, or heavy enough so that almost all gravitinos would have decayed before the time of helium synthesis. The second alternative is shown to allow supersymmetry-breaking scales above a model-dependent lower bound of to GeV.
- Received 9 March 1982
DOI:https://doi.org/10.1103/PhysRevLett.48.1303
©1982 American Physical Society