Boundary Terms in Generalized Geometry and doubled field theory

TL;DR

This paper introduces a boundary action in generalized geometry and doubled field theory that ensures duality invariance, including previously neglected boundary contributions, by combining the Gibbons-Hawking term with boundary pieces.

Contribution

It presents a new boundary action that makes duality manifest and invariant in generalized geometry and doubled field theory frameworks.

Findings

Boundary action complements duality manifest actions

Ensures duality invariance including boundary terms

Expressed in terms of generalized geometry metric

Abstract

We propose a boundary action to complement the recently developed duality manifest actions in string and M-theory using generalized geometry. This boundary action combines the Gibbons-Hawking term with boundary pieces that were previously neglected in the construction of these actions. The combination may be written in terms of the metric of generalized geometry. The result is to produce an action that is duality invariant including boundary terms.