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arXiv · 2405.13679

Charged Nariai black holes on the dark bubble

Ulf Danielsson·Vincent Van Hemelryck
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Abstract

In this paper, we realise the charged Nariai black hole on a braneworld from a nucleated bubble in AdS$_5$, known as the dark bubble model. Geometrically, the black hole takes the form of a cylindrical spacetime pulling on the dark bubble. This is realised by a brane embedding in an AdS$_5$ black string background. Identifying the brane with a D3-brane in string theory allows us to determine a relation between the fine structure constant and the string coupling, $\alpha_\text{EM} = \frac{3}{2} g_s$, which was previously obtained for a microscopic black hole. We also speculate on the consequences for the Festina Lente bound and neutrino masses.

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Ulf Danielsson, Vincent Van Hemelryck. 2024-05-22. Charged Nariai black holes on the dark bubble. https://doi.org/10.1088/1361-6382/ad8f8d

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