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The $x$-dependence of hadrons' generalized parton distributions (GPDs)$\mathcal{F}(x,\xi,t)$ is the most difficult to extract from the existing knownprocesses, while the $\xi$ and $t$ dependence are uniquely determined by thekinematics of the scattered hadron. We study the single diffractive hardexclusive processes for extracting GPDs in the photoproduction. We demonstratequantitatively the enhanced sensitivity on extracting the $x$-dependence ofvarious GPDs from the photoproduction cross sections, as well as theasymmetries constructed from photon polarization and hadron spin that could bemeasured at JLab Hall D by GlueX Collaboration and future facilities.

Extraction of the $x$-dependence of generalized parton distributions from exclusive photoproduction