If such a 'black ring' could be produced in a particle accelerator such as the Large Hadron Collider, this would provide the evidence that higher dimensions exist.
The higher-dimensional generalization of the Kerr metric was discovered by Robert Myers and Malcolm Perry.
The construction involves making a Kerr–Schild ansatz; by a similar method, the solution has been generalized to include a cosmological constant.
In 2014, Hari Kunduri and James Lucietti proved the existence of a black hole with Lens space topology of the L(2, 1) type in five dimensions,[2] this was next extended to all L(p, 1) with positive integers p by Shinya Tomizawa and Masato Nozawa in 2016[3] and finally in a preprint to all L(p, q) and any dimension by Marcus Khuri and Jordan Rainone in 2022,[4][5] a black lens doesn't necessarily need to rotate as a black ring but all examples so far need a matter field coming from the extra dimensions to remain stable.
In four dimensions, Hawking proved that the topology of the event horizon of a non-rotating black hole must be spherical.