2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40606The existence of large extra dimensions enables to explain very simply the various neutrino suppression data. The flavour neutrinos, confined on the brane, are coupled to a "bulk" neutrino state, which is seen as an infinite tower of Kaluza-Klein states from the 4-dimensional point of view. The oscillation of flavour neutrinos into these states can lead to a global and sizable energy-independent suppression at large distances, which can be related to the solar neutrino puzzle.Manuscript for the Proceedings of the conference "Rencontres de Moriond 2001 : Electroweak Interactions and Unified Theories"High Energy Physics - Phenomenologytext