RT Journal Article T1 Dark geometry A1 Ruiz Cembranos, José Alberto A1 Dobado González, Antonio A1 López Maroto, Antonio AB Extra-dimensional theories contain additional degrees of freedom related to the geometry of the extra space which can be interpreted as new particles. Such theories allow to reformulate most of the fundamental problems of physics from a completely different point of view. In this essay, we concentrate on the brane fluctuations which are present in brane-worlds, and how such oscillations of the own space-time geometry along curved extra dimensions can help to resolve the Universe missing mass problem. The energy scales involved in these models are low compared to the Planck scale, and this means that some of the brane fluctuations distinctive signals could be detected in future colliders and in direct or indirect dark matter searches. PB World Scientific Publ Co Pte Ltd SN 0218-2718 YR 2004 FD 2004-12 LK https://hdl.handle.net/20.500.14352/50734 UL https://hdl.handle.net/20.500.14352/50734 LA eng NO © World Scientic Publishing Company.This work has been partially supported by the DGICYT (Spain) under the project numbers FPA 2000-0956 and BFM2002-01003. NO DGICYT (Spain) DS Docta Complutense RD 22 abr 2025