Force-free higher derivative Einstein-Maxwell theory and multi-centered black holes
arXiv:2307.06478 · doi:10.1007/JHEP09(2023)139
Abstract
We investigate which 4-derivative extensions of Einstein-Maxwell theory admit multi-extremal black hole solutions with gravitational force balanced by Coulomb force. We obtain a set of constraints on the 4-derivative couplings by exploring various probe limits in multi-black hole systems. It turns out that these constraints are tighter than those needed to protect the mass-charge ratio of extremal black holes from higher derivative corrections. In fact, they are so strong that the Majumdar-Papapetrou multi-black solutions are unmodified by the force-free combinations of the 4-derivative couplings. Explicit examples of such 4-derivative couplings are given in 4- and 5-spacetime dimensions. Interestingly these include curvature-squared supergravity actions and the quasi-topological term.
arXiv comment34 pages, reproducing curvature-squared supergravity actions in D=5 as well
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