2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37671The mass of the W boson is measured at LEP by fully reconstructing the W boson decays. The measurement techniques and systematic uncertainties are presented. The current measurement of the mass of the W boson at LEP yields 80.412 +/- 0.042 GeV.Proceedings of the XXXIXth Rencontres de Moriond, 2004, Electroweak Interactions and Unified Theories, Ed. J. Tran Thanh VanHigh Energy Physics - Experimenttext