Why We Need Neutron Data for Pion Photoproduction

An overview of the GW SAID group effort to analyze new pion photoproduction on neutron-target. The main database contribution came from the recent CLAS and MAMI unpolarized and polarized measurements. The differential cross section for the processes $\gamma $n$\to \pi $N was extracted from new measurements accounting for Fermi motion effects in the impulse approximation (IA) as well as NN and $\pi $N effects beyond the IA. The EM resonance coupling results are compared to other recent studies.