Nonlinearly Realized Extended Supergravity

TL;DR

This paper develops a nonlinear coset construction for extended supergravity with any number of supersymmetries, linking it to goldstino dynamics and potential experimental probes.

Contribution

It introduces a novel nonlinear realization framework for extended supergravity with arbitrary supersymmetry count using coset methods.

Findings

Provides a coset-based nonlinear realization of supergravity.

Connects goldstino embedding to nonlinear supersymmetry realization.

Discusses implications for future experimental detection of gravitino degrees of freedom.

Abstract

We provide nonlinear realization of supergravity with an arbitrary number of supersymmetries by means of coset construction. The number of gravitino degrees of freedom counts the number of supersymmetries, which will be possibly probed in future experiments. We also consider goldstino embedding in the construction to discuss the relation to nonlinear realization with rigid supersymmetries.