Generalized Off-Shell ADT Conserved Charges in the Presence of Matter Chern-Simons Term

TL;DR

This paper extends the off-shell ADT formalism to include matter fields and gauge transformations, demonstrating its equivalence to other methods and applying it to compute conserved charges of five-dimensional black holes.

Contribution

It introduces a generalized off-shell ADT formalism incorporating internal gauge transformations and matter Chern-Simons terms, unifying it with existing covariant approaches.

Findings

Validated the formalism by computing charges of G"odel black holes

Reproduced known results for non-extremal rotating charged black holes

Established equivalence with covariant phase space and BBC formalisms

Abstract

In this paper we elevate the formalism for off-shell Abbott-Deser-Tekin (ADT) conserved charges in the presence of arbitrary matter fields to including the internal gauge transformation, when the gauge fields are present. For this purpose, we resort to exact symmetry, and the symmetry generator is combined by diffeomorphism and internal gauge transformation. For universality, we consider an apparently non-covariant Lagrangian, which contains a matter Chern-Simons term. We show that the elevated off-shell ADT formalism is equivalent to the covariant phase space method and the Barnich-Brandt-Comp\`ere (BBC) formalism. To check the validity of our method, we explicitly compute the conserved charges of general non-extremal rotating charged G\"odel black holes in minimal five-dimensional gauged supergravity, reproducing the previously known results.