2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39519Motivated by the anomaly in the KARMEN experiment, we study new possibilities for brane-world models of neutrino masses. We show that the KARMEN anomaly can be understood in the context of a six-dimensional brane-world model. The fine-tuning problem associated with the single-particle interpretation of the anomaly is thereby alleviated. Our model shows some interesting properties of general interest for brane-world neutrino physics. In particular, the size of the brane-bulk mixing decouples from the scales relevant for atmospheric and solar neutrino oscillations.23 pages, 2 eps figures, latex2eHigh Energy Physics - Phenomenologytext