Instability of hairy black holes in regularized 4-dimensional Einstein-Gauss-Bonnet gravity

Research output: Contribution to journalArticlepeer-review

Abstract

In regularized 4-dimensional Einstein-Gauss-Bonnet (EGB) gravity derived from a Kaluza-Klein reduction of higher-dimensional EGB theory, we study the existence and stability of black hole (BH) solutions on a static and spherically symmetric background. We show that asymptotically-flat hairy BH solutions realized for a spatially-flat maximally symmetric internal space are unstable against linear perturbations for any rescaled GB coupling constant. This instability is present for the angular propagation of even-parity perturbations both in the vicinity of an event horizon and at spatial infinity. There is also a strong coupling problem associated with the kinetic term of even-parity perturbations vanishing everywhere.

Original languageEnglish
Article number137329
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume833
DOIs
Publication statusPublished - 2022 Oct 10

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Fingerprint

Dive into the research topics of 'Instability of hairy black holes in regularized 4-dimensional Einstein-Gauss-Bonnet gravity'. Together they form a unique fingerprint.

Cite this