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

TL;DR

This paper studies how the final-state interaction between eta' mesons and nucleons affects eta' photoproduction off nucleons, revealing an enhancement near the threshold and suggesting angular dependence as a probe.

Contribution

It introduces a model-based analysis of eta' N final-state interactions and their impact on photoproduction cross sections, highlighting the importance of FSI effects.

Findings

Enhanced cross section near eta'N threshold due to FSI

Forward angles reproduce energy dependence well with FSI

Backward angles can probe eta'N interaction strength

Abstract

We investigate the $\eta'$ photoproduction off the nucleon with a particular interest 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 find an 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 at forward angles, the energy dependence near the $\eta'N$ threshold is well reproduced with the $\eta'N$ FSI. The cross section at backward angles can also be a good probe to investigate the strength of the $\eta'N$ interaction.