Europe/Lisbon
Online

Sukruti Bansal, Chulalongkorn University Bangkok

Unimodular versus Nilpotent Superfield Approach to Pure dS Supergravity

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 four dimensional action. A novel approach to de Sitter vacua in supergravity involves the generalisation of unimodular gravity to supergravity using a super-Stückelberg mechanism. We make a connection between this new approach and the previous two which are in the context of nilpotent superfields and the goldstino brane.

Unusual hour.

Projecto FCT UIDB/04459/2020.