Non‐linear Realizations and Higher Curvature Supergravity. Issue 12 (27th October 2017)

• Record Type: Journal Article
• Authors: Farakos, F.; Ferrara, S.; Kehagias, A.; Lüst, D.
• Is Part Of: Fortschritte der Physik. Volume 65:Issue 12(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-10-27
• Subjects: Higher curvature supergravity -- nilpotent superfileds -- non‐linerly realized supersymmetry -- supergravity; Physics -- Periodicals; 530.05
• DOI: 10.1002/prop.201700073
• Languages: English
• ISSNs: 0015-8208

Abstract

Abstract: We focus on non‐linear realizations of local supersymmetry as obtained by using constrained superfields in supergravity. New constraints, beyond those of rigid supersymmetry, are obtained whenever curvature multiplets are affected as well as higher derivative interactions are introduced. In particular, a new constraint, which removes a very massive gravitino is introduced, and in the rigid limit it merely reduces to an explicit supersymmetry breaking. Higher curvature supergravities free of ghosts and instabilities are also obtained in this way. Finally, we consider direct coupling of the goldstino multiplet to the super Gauss–Bonnet multiplet and discuss the emergence of a new scalar degree of freedom. Abstract : The authors focus on non‐linear realizations of local supersymmetry as obtained by using constrained superfields in supergravity. New constraints, beyond those of rigid supersymmetry, are obtained whenever curvature multiplets are affected as well as higher derivative interactions are introduced. In particular, a new constraint, which removes a very massive gravitino is introduced, and in the rigid limit it merely reduces to an explicit supersymmetry breaking. Higher curvature supergravities free of ghosts and instabilities are also obtained in this way. Finally, direct coupling of the goldstino multiplet to the super Gauss–Bonnet multiplet and the emergence of a new scalar degree of freedom is discussed.