Spin-four N=7 W-Supergravity: S-fold and Double Copy Construction

TL;DR

This paper constructs a novel N=7 W-supergravity and W-string theory via a double copy approach involving S-folds of N=4 super Yang-Mills, resulting in non-perturbative models with massive higher spin states.

Contribution

It introduces a new class of non-perturbative, higher spin supergravity and string theories with N=7 supersymmetry, constructed through S-fold and double copy techniques.

Findings

Constructed N=7 W-supergravity without a perturbative Lagrangian

Developed N=3 heterotic S-fold model with no perturbative realization

Identified massive higher spin supermultiplets in the spectrum

Abstract

In the present investigation we consider the possibility of having new massive, higher spin W-supergravity theories, which do not exist as four-dimensional perturbative models. These theories are based on a double copy construction of two supersymmetric field theories, where at least one factor is given by a N=3 field theory, which is a non-perturbative S-fold of N=4 super Yang-Mills theory. In this way, we can obtain as S-folds a new N=7 (corresponding to 28 supercharges) W-supergravity and its N=7 W-superstring counterpart, which both do not exist as four-dimensional perturbative models with an (effective) Langrangian description. The resulting field resp. string theory does not contain any massless states, but instead a massive higher spin-four supermultiplet of the N=7 supersymmetry algebra. Furthermore we also construct a four-dimensional heterotic S-fold with N=3 supersymmetry. It again does not exist as perturbative heterotic string model and can be considered as the heterotic counterpart of the N=3 superconformal field theories, which were previously constructed in the context of type I orientfold models.