2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46230We discuss a formula for the sum of tree diagrams of $n$-bosons scattering from a heavy fermion. This formula can be considered as a generalization of the eikonal formula to include non-abelian vertices. It will be used to demonstrate the consistency of multi-meson-fermion scattering in the large-$N_c$ limit.Based on a talk given at the International Symposium on Heavy Flavor and Electroweak Theory, August 16--19, 1995, Beijing. uu-encoded latex file with three postscript figures (12 pages)High Energy Physics - PhenomenologyHigh Energy Physics - Theorytext