2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/83011We have developed a model for the N N --> N N pi pi reaction and evaluated cross sections for the different charged channels. The low energy part of those channels where the pions can be in an isospin zero state is dominated by N* excitation, driven by an isoscalar source followed by the decay N* --> N (pi pi, T=0, s-wave). At higher energies, and in channels where the pions are not in T=0, Delta excitation mechanisms become relevant.5 pages, 5 eps figures. Talk presented at Mesons and Light Nuclei, Aug. 31 - Sept. 4, 1998, Pruhonice (Prague), Czech RepublicNuclear Theorytext