paper

Black hole thermodynamics at 4 derivatives, natural variables and BPS limits

arXiv:2505.22726 · doi:10.1007/JHEP10(2025)118

Abstract

We study Einstein-Maxwell theory in spacetime dimensions including all Lorentz-invariant parity-even four-derivative couplings. Building on the results of arXiv:2312.11610, we consider static, charged, asymptotically flat black hole solutions to first order in the higher-derivative expansion. In and , we compute the corrected black hole thermodynamics and compare with the Reall-Santos prescription based on the two-derivative background, highlighting a subtlety when both inner and outer horizons are involved. By introducing natural variables, as in arXiv:2304.07320, we recast the on-shell actions in terms of left- and right-moving chemical potentials, which significantly simplifies the analysis. We also compute first-order thermodynamic corrections for the most general rotating black holes in and , without modifying the background solutions. We identify a novel BPS-like limit in , extending known supergravity results beyond their traditional domain of validity. Finally, in , the analysis of BPS and almost BPS limits enables an independent verification of the five-dimensional BPS thermodynamics. We clarify the origin of a discrepancy in the literature concerning higher-derivative supergravity localization, sharpening the tension between direct computations and predictions based on the / connection.

43 pages

References in corpus (65)