2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/82644The nuclear response is evaluated in the frame of the bosonic loop expansion in a purely nucleonic dynamical scheme, which seems to be reliable in handling those channels where a direct excitation of a $Δ$-resonance is not allowed. It is shown that the response strongly depends upon the effective interaction in the spin-transverse isovector channel. New experiments at CEBAF on parity-violating electron scattering could further constrain the form of the effective interaction.to appear in Journ. Phys. GNuclear Theorytext