# Nonlinear ${\cal N}=2$ Global Supersymmetry

## TL;DR

This paper develops a new formalism for off-shell nonlinear realization of partial ${
m N}=2$ supersymmetry breaking, focusing on Goldstone modes in deformed superfields and their interactions.

## Contribution

It introduces a novel off-shell formalism for partial ${
m N}=2$ supersymmetry breaking using deformed superfields with nilpotent constraints, extending previous scattered results.

## Key findings

- Derived actions for deformed ${
m N}=2$ superfields
- Analyzed interactions of Goldstone supermultiplets
- Described constraints for incomplete ${
m N}=2$ matter multiplets

## Abstract

We study the partial breaking of ${\cal N}=2$ global supersymmetry, using a novel formalism that allows for the off-shell nonlinear realization of the broken supersymmetry, extending previous results scattered in the literature. We focus on the Goldstone degrees of freedom of a massive ${\cal N}=1$ gravitino multiplet which are described by deformed ${\cal N}=2$ vector and single-tensor superfields satisfying nilpotent constraints. We derive the corresponding actions and study the interactions of the superfields involved, as well as constraints describing incomplete ${\cal N}=2$ matter multiplets of non-linear supersymmetry (vectors and single-tensors).