2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37672Lepton and quark asymmetries at Z boson peak are a powerful means to test the couplings of the Z boson to fermions. The measurements performed at LEP and SLC colliders are reviewed, and their impact on the determination of the electroweak mixing angle is presented.4 pages, 2 figures, talk given at IFAE 2003, Lecce, 23-26 april 2003High Energy Physics - Experimenttext