2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/205660We show that classical electrodynamics of massless charged particles and the Yang--Mills theory of massless quarks do not experience rearranging their initial degrees of freedom into dressed particles and radiation. Massless particles do not radiate. We consider a version of the direct interparticle action theory for these systems following the general strategy of Wheeler and Feynman.LaTeX; 20 pages; V4: discussion is slightly modified to clarify some important points, relevant references are addedHigh Energy Physics - Theorytext