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Living Inside a Hedgehog: Higher-dimensional Solutions that Localize Gravity

Tony Gherghetta·Ewald Roessl·Mikhail Shaposhnikov
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Abstract

We consider spherically symmetric higher-dimensional solutions of Einstein's equations with a bulk cosmological constant and n transverse dimensions. In contrast to the case of one or two extra dimensions we find no solutions that localize gravity when $n\geq 3$, for strictly local topological defects. We discuss global topological defects that lead to the localization of gravity and estimate the corrections to Newton's law. We show that the introduction of a bulk ``hedgehog'' magnetic field leads to a regular geometry and localizes gravity on the 3-brane with either a positive, zero or negative bulk cosmological constant. The corrections to Newton's law on the 3-brane are parametrically the same as for the case of one transverse dimension.

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Tony Gherghetta, Ewald Roessl, Mikhail Shaposhnikov. 2000-09-27. Living Inside a Hedgehog: Higher-dimensional Solutions that Localize Gravity. https://doi.org/10.1016/s0370-2693(00)00979-5

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