Unimodular vs nilpotent superfield approach to pure dS supergravity

Bansal, Sukruti; Nagy, Silvia; Padilla, Antonio; Zavala, Ivonne

Abstract

Recent progress in understanding de Sitter spacetime in supergravity and string theory has led to the development of a four dimensional supergravity with spontaneously broken supersymmetry allowing for de Sitter vacua, also called de Sitter supergravity. One approach makes use of constrained (nilpotent) superfields, while an alternative one couples supergravity to a locally supersymmetric generalization of the Volkov-Akulov goldstino action. These two approaches have been shown to give rise to the same 4D action. A novel approach to de Sitter vacua in supergravity involves the generalisation of unimodular gravity to supergravity using a super-Stückelberg mechanism. In this paper, we make a connection between this new approach and the previous two which are in the context of nilpotent superfields and the goldstino brane. We show that upon appropriate field redefinitions, the 4D actions match up to the cubic order in the fields. This points at the possible existence of a more general framework to obtain de Sitter spacetimes from high-energy theories.

Citation

Bansal, S., Nagy, S., Padilla, A., & Zavala, I. (2021). Unimodular vs nilpotent superfield approach to pure dS supergravity. Journal of High Energy Physics, 2021(1), Article 146 (2021). https://doi.org/10.1007/jhep01%282021%29146

• Journal Article Type: Article
• Acceptance Date: Dec 7, 2020
• Online Publication Date: Jan 22, 2021
• Publication Date: Jan 22, 2021
• Deposit Date: Feb 5, 2021
• Publicly Available Date: Feb 5, 2021
• Journal: Journal of High Energy Physics
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 2021
• Issue: 1
• Article Number: 146 (2021)
• DOI: https://doi.org/10.1007/jhep01%282021%29146
• Keywords: Supergravity Models, Supersymmetry Breaking, Space-Time Symmetries, Superspaces
• Public URL: https://nottingham-repository.worktribe.com/output/5293283
• Publisher URL: https://link.springer.com/article/10.1007/JHEP01(2021)146
• Additional Information: Bansal, S., Nagy, S., Padilla, A. et al. Unimodular vs nilpotent superfield approach to pure dS supergravity. J. High Energ. Phys. 2021, 146 (2021). https://doi.org/10.1007/JHEP01(2021)146