1996/06/05 by Nick E. Mavromatos, N. E. Mavromatos, Mavromatos, N. E.
Mathematics · Physics and Astronomy · #Algebraic Geometry and Number Theory #Black Holes and Theoretical Physics #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th) #Mathematics and Applications #gr-qc #hep-th
paper · pdf · doi:10.48550/arxiv.gr-qc/9606008
16 pages LATEX, 1 Macro (hep93 sty) required; Invited Contribution to the 5th Hellenic School and Workshops on High-Energy Physics, Corfu (Greece), September 3-24 1995
arxiv created 1996/06/05 · openalex publication_date 1996/06/05 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
I discuss a recent analytic proof of bypassing the no-hair conjecture for two interesting (and quite generic) cases of four-dimensional black holes: (i) black holes in Einstein-Yang-Mills-Higgs (EYMH) systems and (ii) black holes in higher-curvature (Gauss-Bonnet (GB) type) string-inspired gravity. Both systems are known to possess black-hole solutions with non-trivial scalar hair outside the horizon. The `spirit' of the no-hair conjecture, however, seems to be maintained either because the black holes are unstable (EYMH), or because the hair is of secondary type (GB), i.e. it does not lead to new conserved quantum numbers.