High frequency gravitational waves from spin-3/2 fields

Abstract

We point out the peculiar form of the gravitational wave signal expected from a gas of particles carry spin 3/2 produced during preheating. Given the very few ways that gravitinos can manifest themselves in an experimentally observable way, we stress the importance of improving the sensitivity of ultra-high frequency detectors in the future. This review is based on work that appeared in [arXiv:1811.11774 [hep-ph]].

Comments: 9 pages, 1 figure. Contribution to the proceedings of the 7th International Conference on New Frontiers in Physics (ICNFP 2019), 21-29 August 2019, Crete, Greece