Isospin decomposition of $\gamma N \to N^*$ transitions within a dynamical coupled-channels model

Understand

By extending the dynamical coupled-channels analysis performed in our previous work [Phys.

• Rev.
• C 88, 035209 (2013)] to include the available data of photoproduction of pi meson off the neutron, the transition amplitudes for the photo-excitation of the neutron to nucleon resonances, gamma n --> N*, at the resonance pole positions are determined.
• The combined fits to the data for both the proton- and neutron-target reactions also revise our results for the resonance pole positions and the gamma p --> N* transition amplitudes.