2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/205447The various sources of Rational Terms contributing to the one-loop amplitudes are critically discussed. We show that the terms originating from the generic (n-4)-dimensional structure of the numerator of the one-loop amplitude can be derived by using appropriate Feynman rules within a tree-like computation. For the terms that originate from the reduction of the 4-dimensional part of the numerator, we present two different strategies and explicit algorithms to compute them.14 pages, 3 figures, uses axodraw.styHigh Energy Physics - Phenomenologytext