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arXiv · 2511.20402

New framework for extracting GPDs from exclusive photon electroproduction

Jian-Wei Qiu·Nobuo Sato·Zhite Yu
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Abstract

Recently, a new framework for studying generic $2 \to 3$ hard exclusive reactions, referred to as single-diffractive hard exclusive processes, has been introduced to provide a cleaner separation of the underlying physical mechanisms. In this work, we expand this formalism to the case of exclusive real-photon electroproduction off a nucleon, $e(\ell) + N(p) \to e(\ell') + N(p') + \gamma(q')$, which represents the classical channel for accessing generalized parton distributions (GPDs) in nucleons and nuclei. This extension enables a more systematic and physically transparent formulation of the reaction dynamics, paving the way for improved extractions of GPDs from experimental data as compared to existing approaches.

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Jian-Wei Qiu, Nobuo Sato, Zhite Yu. 2025-11-25. New framework for extracting GPDs from exclusive photon electroproduction. https://doi.org/10.1103/36xc-mv5r

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