Insights into gravitinos abundance, cosmic strings and stochastic gravitational wave background K. El Bourakadi, G. Otalora, A. Burton-Villalobos, H. Chakir, M. Ferricha-Alami and M. Bennai Eur. Phys. J. C, 84 11 (2024) 1209 Published online: 22 November 2024 DOI: 10.1140/epjc/s10052-024-13550-7