On scalar charges and black hole thermodynamics

Feb 22, 2023
Published in:
  • JHEP 05 (2023) 158
  • Published: May 18, 2023
e-Print:
Report number:
  • IFT-UAM/CSIC-23-018

Citations per year

20212022202320241078
Abstract: (Springer)
We revisit the first law of black hole thermodynamics in 4-dimensional theories containing scalar and Abelian vector fields coupled to gravity using Wald’s formalism and a new definition of scalar charge as an integral over a 2-surface which satisfies a Gauss law in the background of stationary black-hole spacetimes. We focus on ungauged supergravity-inspired theories with symmetric sigma models whose symmetries generate electric-magnetic dualities leaving invariant their equations of motion. Our manifestly duality-invariant form of the first law is compatible with the one obtained by of Gibbons, Kallosh and Kol. We also obtain the general expression for the scalar charges of a stationary black hole in terms of the other physical parameters of the solution and the position of the horizon, generalizing the expression obtained by Pacilio for dilaton black holes.
Note:
  • Misprints corrected and a few comments and references added. Version to be published in JHEP
  • Black Holes
  • Global Symmetries
  • Space-Time Symmetries
  • Black Holes in String Theory
  • charge: scalar
  • black hole: thermodynamics
  • field theory: vector
  • space-time: black hole
  • abelian
  • gravitation