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We investigate the $\eta'$ photoproduction off the nucleon with a particularinterest in the effect of the final-state interaction (FSI) of the $\eta'$meson and nucleon $(\eta'N)$ based on three-flavor linear sigma model. We findan enhancement in the cross section of the $\eta'$ photoproduction near the$\eta'N$-threshold energy owing to the $\eta'N$ FSI. With the $\eta'$ meson atforward angles, the energy dependence near the $\eta'N$ threshold is wellreproduced with the $\eta'N$ FSI. The cross section at backward angles can alsobe a good probe to investigate the strength of the $\eta'N$ interaction.

Effect of the final state interaction of $\eta' N$ on the $\eta'$ photoproduction off nucleon