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PP-waves on Superbrane Backgrounds
Marco Cavaglia, Benjamin Harms
In this paper we discuss a method of generating supersymmetric solutions of the Einstein equations. The method involves the embedding of one supersymmetric spacetime into another.…
Gravitational Larmor formula in higher dimensions
Vitor Cardoso, Marco Cavaglia, Jun-Qi Guo
The Larmor formula for scalar and gravitational radiation from a pointlike particle is derived in any even higher-dimensional flat spacetime. General expressions for the field in t…
Gravitational diffraction radiation
Vitor Cardoso, Marco Cavaglia, Mario Pimenta
We show that if the visible universe is a membrane embedded in a higher-dimensional space, particles in uniform motion radiate gravitational waves because of spacetime lumpiness. T…
Hawking emission of gravitons in higher dimensions: non-rotating black holes
Vitor Cardoso, Marco Cavaglia, Leonardo Gualtieri
We compute the absorption cross section and the total power carried by gravitons in the evaporation process of a higher-dimensional non-rotating black hole. These results are appli…
Black hole particle emission in higher-dimensional spacetimes
Vitor Cardoso, Marco Cavaglia, Leonardo Gualtieri
In models with extra dimensions, a black hole evaporates both in the bulk and on the visible brane, where standard model fields live. The exact emissivities of each particle specie…
Relic gravitons on Kasner-like branes
M. Cavaglia', G. De Risi, M. Gasperini
We discuss the cosmological amplification of tensor perturbations in a simple example of brane-world scenario, in which massless gravitons are localized on a higher-dimensional Kas…