The role of the Δ(1232) on the longitudinal response in the inclusive electron scattering reaction Original Research Article

We have performed a many-body calculation of the longitudinal nuclear (e,e′) reaction employing a Second RPA (SRPA) formalism which contains the Δ(1232). More explicitly, our scheme contains RPA correlations as well as Hartree–Fock and second order self-energies, where an accurate evaluation of exchange terms is achieved. Using this formalism we have evaluated the longitudinal response function for 40Ca. We give final results at momentum transfers ranging from 300 up to 500 MeV/c, obtaining a good agreement with data.