The N=4 effective action of type IIA supergravity compactified on SU(2)-structure manifolds

TL;DR

This paper derives the low-energy effective action for type IIA supergravity compactified on SU(2)-structure manifolds, revealing how intrinsic torsion influences gauge symmetry and mass generation of tensor fields.

Contribution

It provides the explicit form of the N=4 effective action for these compactifications, including the role of intrinsic torsion and gauge group determination.

Findings

Effective action explicitly derived

Gauge group identified and characterized

Massive tensor fields depend on intrinsic torsion structure

Abstract

We study compactifications of type IIA supergravity on six-dimensional manifolds with SU(2) structure and compute the low-energy effective action in terms of the non-trivial intrinsic torsion. The consistency with gauged N=4 supergravity is established and the gauge group is determined. Depending on the structure of the intrinsic torsion, antisymmetric tensor fields can become massive.