On the generalized Komar charge of Kaluza-Klein theories and higher-form symmetries

Abstract

The generalized Komar $(d-2)$-form charge can be modified by the addition of any other on-shell closed (conserved) $(d-2)$-form charge. We show that, with Kaluza--Klein boundary conditions, one has to add a charge related to the higher-form symmetry identified in Ref.~\cite{Gomez-Fayren:2024cpl} to the naive Komar charge of pure 5-dimensional gravity to obtain a conserved charge charge whose integral at spatial infinity gives the mass. The new term also contains the contribution of the Kaluza--Klein monopole charge leading to electric-magnetic duality invariance.

Latex file, 18 pages, no figures

References in corpus (4)

• Smarr Formula and an Extended First Law for Lovelock Gravity
• On scalar charges and black-hole thermodynamics
• Gravitational higher-form symmetries and the origin of hidden symmetries in Kaluza-Klein compactifications
• Kaluza-Klein Supergravity 2025