2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/185420I discuss the feasibility of measuring the top quark mass by the using of final states with leptons and J/ψat hadron colliders. I also investigate the impact of matrix-element corrections to the HERWIG simulation of top decays.4 pages, 3 figures. Talk given at the UK Phenomenology Workshop on Collider Physics, Durham, U. K., 19-24 September 1999. Revised version with updated resultsHigh Energy Physics - Phenomenologytext