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Free keywords:
High Energy Physics - Theory, hep-th,Astrophysics, Cosmology and Extragalactic Astrophysics, astro-ph.CO, Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE,General Relativity and Quantum Cosmology, gr-qc,High Energy Physics - Phenomenology, hep-ph
Abstract:
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.