2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37642Four-fermion productions measured in the LEP2 data are reviewed. The total and differential cross-section yields represent the first clear evidence for the existence of gauge boson self couplings, in support of the non-abelian SU(2)xU(1) structure of the electroweak model, at the percent level.4 pages, 3 figures. To appear in the Proceedings of 'XV IFAE - Incontri sulla Fisica delle Alte Energie', 23-26 April 2003, Lecce, ItalyHigh Energy Physics - Experimenttext