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Accessing pion GPDs through the Sullivan process: is it feasible?

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arxiv 2203.16947 v1 pith:CJ443R63 submitted 2022-03-31 hep-ph nucl-th

Jose Manuel Morgado Chávez , Valerio Bertone , Maxime Defurne , Feliciano de Soto , Cédric Mezrag , Hervé Moutarde , José Rodríguez-Quintero , Jorge Segovia This is my paper · ORCID
classification hep-phnucl-th
keywords gpdspioncffscomptonprocessstructuresullivanaccessing
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Describing hadronic structure is one of the most intriguing problems in physics. In this respect, generalized parton distributions (GPDs) constitute an outstanding tool, allowing to draw "three dimensional pictures" of hadron's inside. Starting from contemporary models for pion's GPDs fulfilling all constraints imposed by QCD, we compute Compton form factors (CFFs) of pions subjected to deeply virtual Compton scattering. We show the behaviour of CFFs to be gluon-dominated at EIC's kinematics. Finally we evaluate lepton-beam-spin asymmetries in the Sullivan process, demonstrating the existence of such and thus triggering optimism about the possibility of probing pion's 3D structure at electron-ion colliders.

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  1. Extraction of Pion Unpolarized Quark and Gluon Generalized Parton Distributions using Deep Neural-Networks

    hep-ph 2026-08 conditional novelty 6.0 of 10

    A DNN fit to pion form-factor and lattice data produces quark and gluon GPDs; quark results agree with lattice, gluon results rely on a fitted normalization factor.

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