2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37835The results of various searches for new physical phenomena beyond the Standard Model using data from the four LEP experiments are summarized. Topics presented include the search for flavour-changing neutral currents with single top production, compositeness leading to the production of excited leptons, and manifestations of extra dimensions.5 pages, 3 figures, To appear in the proceedings of the 5th Rencontres du Vietnam on Particle Physics and Astrophysics, Hanoi, Vietnam, August 5-11, 2004High Energy Physics - Experimenttext