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arXiv · 2609.22405

Coherent deeply virtual Compton scattering on helium-4 beyond the leading twist approximation

V. Martínez-Fernández·B. Pire·P. Sznajder·J. Wagner
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Abstract

Coherent hard exclusive reactions on light nuclei offer access to their quark and gluon structure and provide a framework for three-dimensional nuclear tomography. We analyze deeply virtual Compton scattering on a helium-4 target, including leading-twist contributions as well as kinematical twist-3 and twist-4 effects. We present numerical estimates of cross sections and asymmetries for kinematic regimes relevant to JLab experiments. We emphasize the importance of next to leading order (NLO) and kinematical twist 3 and 4 contributions to interpret data in the JLab kinematics. We deduce a first tomographic image of quarks and gluons in the helium-4 nucleus.

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V. Martínez-Fernández, B. Pire, P. Sznajder, J. Wagner. 2026-09-18. Coherent deeply virtual Compton scattering on helium-4 beyond the leading twist approximation. https://arxiv.org/abs/2609.22405

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