Extraction of the Parton Momentum-Fraction Dependence of Generalized Parton Distributions from Exclusive Photoproduction

Abstract

The $x$ dependence of hadrons' generalized parton distributions (GPDs) $\mathcal{F}(x,\xi ,t)$ is the most difficult to extract from the existing known processes, while the $\xi$ and $t$ dependence are uniquely determined by the kinematics of the scattered hadron. We study the single diffractive hard exclusive processes for extracting GPDs in the photoproduction. We demonstrate quantitatively the enhanced sensitivity on extracting the $x$ dependence of various GPDs from the photoproduction cross sections, as well as the asymmetries constructed from photon polarization and hadron spin that could be measured at JLab Hall D by GlueX Collaboration and future facilities.

5 pages, 5 figures, plus a supplemental material that is 5 pages + 2 figures; to match the journal version

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• The deconvolution problem of deeply virtual Compton scattering
• Single diffractive hard exclusive processes for the study of generalized parton distributions
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• Electroproduction of a large invariant mass photon pair
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Cited by in corpus (9)

• Towards Unpolarized GPDs from Pseudo-Distributions
• Moments of Axial-Vector GPD from Lattice QCD: Quark Helicity, Orbital Angular Momentum, and Spin-Orbit Correlation
• Extracting transition generalized parton distributions from hard exclusive pion-nucleon scattering
• Gluon Generalized TMDs and Wigner Distributions in boost invariant longitudinal space
• Momentum Flow Mechanisms and Color-Lorentz Forces on Quarks in the Nucleon
• Exclusive photoproduction of ${\eta }_c\gamma$ pairs with large invariant mass
• Photoproduction of ${\eta }_c\gamma$ pairs in CGC framework
• Unified and optimal frame choice for generalized parton distributions
• New framework for extracting GPDs from exclusive photon electroproduction