Baryon transition current structure (N(1520) magnetic dipole amplitude) revisited: Insights from Patterson function analysis

The transition-current structure associated with the N(1520) magnetic dipole amplitude is investigated using a Patterson-function reconstruction based directly on empirical GM transition form-factor data. Because the analysis relies exclusively on experimentally extracted information, the resulting spatial distribution is obtained without introducing model-dependent assumptions regarding the internal structure of the resonance. The reconstructed Patterson density exhibits a strongly localized central peak with a maximum value of 232.2 fm⁻⁶ and a half-maximum radius of 0.0504 fm, indicating a highly compact transition-current distribution. The profile remains predominantly positive throughout the reconstructed region and displays nodal positions near r=0.123 fm and r=0.32 fm. Comparison with previously reconstructed nucleon, meson, light-nuclear, and baryon-transition systems shows that the N(1520) magnetic dipole amplitude belongs to the class of transition-current distributions characterized by relatively strong spatial localization. The results demonstrate the usefulness of Patterson-function analysis as a model-independent method for examining spatial features of hadronic transition currents directly from empirical form-factor data.