2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/82071We analyzed the results for finite nuclei and infinite nuclear and neutron matter using the standard $σ-ω$ model and with the effective field theory. For the first time, we have shown here quantitatively that the inclusion of self-interaction of the vector mesons and the cross-interaction of all the mesons taken in the theory explain naturally the experimentally observed softness of equation of state without loosing the advantages of standard $σ-ω$ model for finite nuclei. Recent experimental observations support our findings and allow us to conclude that without self- and cross-interactions the relativistic mean field theory is incomplete.4 pages, 4 figuresNuclear Theorytext