2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40416We make a fresh evaluation of contributions to (g-2) of the muon in the framework of a preonic model with coloured vectorlike leptons and heavy coloured Z bosons and discuss their implications in the light of the recent Brookhaven measurement. It is shown that the observed deviation can be explained within this framework with masses and couplings consistent with all constraints.Published version, 8 pages, Latex, figures updatedHigh Energy Physics - Phenomenologytext