Corpus ID: 231986164

Catastrophic Production of Slow Gravitinos

@inproceedings{Kolb2021CatastrophicPO,
  title={Catastrophic Production of Slow Gravitinos},
  author={E. Kolb and A. J. Long and E. Mcdonough},
  year={2021}
}
We study gravitational particle production of the massive spin-3/2 Rarita-Schwinger field, and its close relative, the gravitino, in FRW cosmological spacetimes. For masses lighter than the value of the Hubble expansion rate after inflation, m3/2 . H , we find catastrophic gravitational particle production, wherein the number of gravitationally produced particles is divergent, caused by a transient vanishing of the helicity1/2 gravitino sound speed. In contrast with the conventional gravitino… Expand
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