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Shrouded black holes in Einstein-Gauss-Bonnet gravity
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SYSNO ASEP 0567208 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Shrouded black holes in Einstein-Gauss-Bonnet gravity Author(s) Babichev, E. (FR)
Emond, William T. (FZU-D) ORCID
Ramazanov, Sabir (FZU-D) ORCIDNumber of authors 3 Article number 063524 Source Title Physical Review D. - : American Physical Society - ISSN 2470-0010
Roč. 106, č. 6 (2022)Number of pages 14 s. Language eng - English Country US - United States Keywords coupling: nonminimal ; field theory: scalar ; black hole: static ; gravitation: model Subject RIV BE - Theoretical Physics OECD category Particles and field physics R&D Projects GJ20-16531Y GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000861731100001 EID SCOPUS 85139147421 DOI 10.1103/PhysRevD.106.063524 Annotation We study black holes in a modified gravity scenario involving a scalar field quadratically coupled to the Gauss-Bonnet invariant. The scalar is assumed to be in a spontaneously broken phase at spatial infinity due to a bare Higgs-like potential. For a proper choice of sign, the nonminimal coupling to gravity leads to symmetry restoration near the black hole horizon, prompting the development of the scalar wall in its vicinity. The wall thickness depends on the bare mass of the scalar and can be much smaller than the Schwarzschild radius. In a weakly coupled regime, the quadratic coupling to the Gauss-Bonnet invariant effectively becomes linear, and no walls are formed. We find approximate analytical solutions for the scalar field in the test field regime, and obtain numerically static black hole solutions within this setup. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2023 Electronic address https://doi.org/10.1103/PhysRevD.106.063524
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