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arXiv · 2606.05319

Non-linear evolution of five-dimensional black strings in effective field theory

Pau Figueras·Áron D. Kovács·Shunhui Yao
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Abstract

We use numerical relativity to study the non-linear instability of five-dimensional black strings in Einstein-Gauss-Bonnet gravity. Black strings evolve into a series of black holes joined by thinner string-like segments, but key features of the dynamics depend on the sign of the Gauss-Bonnet coupling. For positive coupling, favored by UV considerations, the growth of curvature invariants is limited within the validity of effective field theory (EFT), suggesting a mechanism for restoring weak cosmic censorship. For negative coupling this cap is absent and curvatures may grow until the EFT breaks down.

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Pau Figueras, Áron D. Kovács, Shunhui Yao. 2026-06-03. Non-linear evolution of five-dimensional black strings in effective field theory. https://arxiv.org/abs/2606.05319

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