On Generalized Axion Reductions

TL;DR

This paper discusses a unified approach to constructing massive supergravity theories via generalized reductions, revealing that multiple mass parameters can be introduced simultaneously, unifying previously distinct theories.

Contribution

It extends the ansatz for generalized reductions, showing all mass parameters can be incorporated together, unifying various massive supergravity theories.

Findings

Mass parameters can be introduced simultaneously in generalized reductions.

Different massive supergravities are part of a single unified theory.

The extended ansatz simplifies the construction of massive supergravity models.

Abstract

Recently interest in using generalized reductions to construct massive supergravity theories has been revived in the context of M-theory and superstring theory. These compactifications produce mass parameters by introducing a linear dependence on internal coordinates in various axionic fields. Here we point out that by extending the form of this simple ansatz, it is always possible to introduce the various mass parameters simultaneously. This suggests that the various ``distinct'' massive supergravities in the literature should all be a part of a single massive theory.