Speaker
Description
We present recent progress in the study of the first and second radial excitations of the nucleon and Δ baryons within a symmetry-preserving contact-interaction framework based on the Schwinger--Dyson, Bethe--Salpeter and Faddeev equations. The approach provides a unified description of baryon masses, Faddeev amplitudes and electromagnetic observables while preserving the relevant Ward--Green--Takahashi identities. Particular attention is devoted to the construction of orthogonal bound-state amplitudes for radial excitations, motivated by the requirements imposed by electromagnetic transition currents. The resulting framework enables a consistent description of elastic and transition form factors involving excited baryons, including N→N*, and transitions to radially excited Δ states. The implications of these developments for the spectroscopy and electromagnetic structure of baryon radial excitations are discussed, together with perspectives for future applications to studies of hadron structure.