title: Detecting extra dimensions with gravity-wave spectroscopy: the black-string brane world.
abstract: Using the black string between two branes as a model of a brane-world black hole, we compute the gravity-wave perturbations and identify the features arising from the additional polarizations of the graviton. The standard four-dimensional gravitational wave signal acquires late-time oscillations due to massive modes of the graviton. The Fourier transform of these oscillations shows a series of spikes associated with the masses of the Kaluza-Klein modes, providing in principle a spectroscopic signature of extra dimensions.
authors.affiliation: Institute of Cosmology & Gravitation, University of Portsmouth, Portsmouth PO1 2EG, United Kingdom.
authors.forename: Sanjeev S
authors.initials: SS
authors.lastname: Seahra
authors.forename: Chris
authors.initials: C
authors.lastname: Clarkson
authors.forename: Roy
authors.initials: R
authors.lastname: Maartens