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Signatures of extra dimensions in gravitational waves
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Considering gravitational waves propagating on the most general 4+N-dimensional space-time, we investigate the effects due to the N extra dimensions on the four-dimensional waves. All wave equations are derived in general and discussed. On Minkowski4 times an arbitrary Ricci-flat compact manifold, we find: a massless wave with an additional polarization, the breathing mode, and extra waves with high frequencies fixed by Kaluza-Klein masses. We discuss whether these two effects could be observed.
Forward citations
Cited by 2 Pith papers
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Optical gravitational waves as signals of Gravitationally-Decaying Particles
A particle that decays only through gravitational channels can produce relic gravitational waves with a narrow optical-frequency spectrum, possibly at an observable abundance near the BBN/CMB bound.
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