2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/196345We present a light-front calculation of the box diagram in Yukawa theory. The covariant box diagram is finite for the case of spin-1/2 constituents exchanging spin-0 particles. In light-front dynamics, however, individual time-ordered diagrams are divergent. We analyze the corresponding light-front singularities and show the equivalence between the light-front and covariant results by taming the singularities.21 pages, 17 figures. submittes to Phys. Rev. DHigh Energy Physics - TheoryNuclear Theorytext