Dualisation of the D=7 Heterotic String

TL;DR

This paper explores the dualisation and first-order formulation of D=7 abelian Yang-Mills supergravity, derived from the low energy limit of the fully Higgsed heterotic string, using a non-linear coset approach with dual fields.

Contribution

It introduces a comprehensive dualisation framework for D=7 supergravity, extending the scalar coset to include all bosonic fields via dual fields and Lie superalgebra construction.

Findings

Developed a dualised coset formulation for D=7 supergravity

Constructed Lie superalgebra generating the dualized coset

Enhanced understanding of the bosonic sector structure

Abstract

The dualisation and the first-order formulation of the D=7 abelian Yang-Mills supergravity which is the low energy effective limit of the D=7 fully Higssed heterotic string is discussed. The non-linear coset formulation of the scalars is enlarged to include the entire bosonic sector by introducing dual fields and by constructing the Lie superalgebra which generates the dualized coset element.