Exciting pions in nuclei: DCX and Electroproduction in the resonance region

We describe the double charge exchange (DCX) reaction of pions with different nuclear targets at incident kinetic energies of 120 − 180 MeV within the GiBUU transport framework. The DCX process is highly sensitive to details of the interactions of pions with the nuclear medium and, therefore, represents a major benchmark for any model of pion scattering off nuclei at low and intermediate energies. We achieve a good quantitative agreement with the extensive data set obtained at LAMPF. Furthermore, we present first results on electron scattering off nuclei for beam energies of 700-1500 MeV and virtualities of Q ≤ 700 MeV. Including quasi-elastic and pionproduction processes and employing in-medium kinematics and realistic form factors, we evaluate inclusive cross sections and compare to data obtained at the ADONE storage ring (Frascati).