Citation

BibTex format

@article{Chen:2025:10.1103/PhysRevD.111.024056,
author = {Chen, CYR and De, Rham C and Tolley, AJ},
doi = {10.1103/PhysRevD.111.024056},
journal = {Physical Review D},
title = {Deformations of extremal black holes and the UV},
url = {http://dx.doi.org/10.1103/PhysRevD.111.024056},
volume = {111},
year = {2025}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - It has recently been noted that deformations of extremal anti-de Sitter (AdS) black holes in four and higher dimensions are generically nonsmooth or singular on the horizon. Further, it was found that certain deformations of asymptotically flat extremal black holes are marginal, causing the nature of the horizon to be strongly sensitive to UV corrections - in particular, Wilson coefficients associated with consistent UV completions generically lead to worse behavior on the horizon. In this work, we extend the discussion of deformed horizons in the presence of UV corrections to extremal charged black holes in AdS, where we find a tower of marginal perturbations for different black hole masses. We argue that the apparent UV sensitivity of marginal modes is, in fact, a feature of the UV theory, which is correctly reproduced by the effective field theory (EFT), and illustrate this with explicit UV completions confirming the validity of the EFT. We demonstrate that the same holds for a scalar-Maxwell EFT with known UV completion. In the gravitational case, the sign of EFT corrections to marginal perturbations is generally connected with the signs implied by positivity bounds, with UV completions generically leading to worse behavior on the horizon. We conjecture that this result is more generic and use this to derive more general positivity bounds motivated by the weak gravity conjecture, which we illustrate with further evidence.
AU  - Chen,CYR
AU  - De,Rham C
AU  - Tolley,AJ
DO  - 10.1103/PhysRevD.111.024056
PY  - 2025///
SN  - 2470-0010
TI  - Deformations of extremal black holes and the UV
T2  - Physical Review D
UR  - http://dx.doi.org/10.1103/PhysRevD.111.024056
VL  - 111
ER  -
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