Low-energy $\eta$-nucleon interaction studied with $\eta$ photoproduction off the deuteron

S. X. Nakamura, H. Kamano, T. Ishikawa

We develop a reaction model for $\eta$ photoproduction off the deuteron ($\gamma d\to \eta pn$), and study the reaction at a special kinematics, where the photon beam energy is $\sim 0.94$ GeV a…