Duality covariant field redefinitions

TL;DR

This paper investigates how the dilaton field influences higher derivative supergravity in Double Field Theory, focusing on fixing non-covariant field redefinitions to maintain duality symmetries.

Contribution

It introduces a method to determine Lorentz non covariant field redefinitions involving the metric and dilaton within Double Field Theory.

Findings

Fixed the Lorentz non covariant redefinitions for metric and dilaton

Clarified the role of the dilaton in duality covariant formulations

Enhanced understanding of higher derivative supergravity in DFT

Abstract

We explore the role of the dilaton field on higher derivative supergravity within the framework of Double Field Theory and use it to fix the Lorentz non covariant field redefinitions connecting the metric and dilaton fields with the duality multiplets.