In this paper, the parametrization of the nuclear structure function, which is directly constrained by the dynamics of QCD in its high-energy limit, is considered. This simple parametrization of the nuclear structure function is obtained from the proton experimental data by relying on a Froissart-bounded parametrization of the proton structure function. This phenomenological model describes high-energy QCD in the presence of saturation effects. Numerical calculations and comparison with available data from the NMC, EMC, and E665 Collaborations demonstrate that the suggested method by Armesto, Salgado, and Wiedemann (the ASW model) provides a reliable ratio of the nuclear structure functions $F_2^A/A{F}_2^p$ at low $x$ for light and heavy nuclei. The magnitude of nuclear shadowing is predicted for various kinematic regions and can be applied as well in the analysis of ultrahigh-energy processes by future experiments at electron-ion colliders.

• Received 8 November 2022
• Accepted 30 January 2023

DOI:https://doi.org/10.1103/PhysRevC.107.025209

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Published by the American Physical Society