2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/48085We study the effects of gluon interference in the production and semi-leptonic decay of a t-tbar pair above threshold at the Next Linear Collider (NLC). We calculate all matrix elements to next-to-leading order and use the resulting expressions for the development of a Monte Carlo event generator. Our results show effects at the level of 10% in differential cross-sections. We thus extend previous results obtained by analytical means in the soft-gluon limit.4 pages, sprocl + 2 figures (included with psfig). Presented at PASCOS 98, Boston, MA, March 1998; to appear in the Proceedings of PASCOS 98 (World Scientific)High Energy Physics - Phenomenologytext