2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/222807All one-massless-loop Feynman diagrams could be written like a linear combination of scalar boxes, triangles an bubbles in $n$ dimensions plus rational terms. However, the four-point scalar integrals in $n+2$ dimensions are free of infrared divergences. We are going to change the dimensions of the scalar boxes $n \to n+2$ and the using of this degree of freedom to simplify the computation of coefficients of the decomposition.17 pagesHigh Energy Physics - Phenomenologytext