Photoproduction of $\eta$ mesons off the proton for $1.2 < E_\gamma < 4.7$ GeV using CLAS at Jefferson Laboratory Preprint
Hu, T, Akbar, Z, Crede, V et al. (2020). Photoproduction of $\eta$ mesons off the proton for $1.2 < E_\gamma <
4.7$ GeV using CLAS at Jefferson Laboratory
.