Parametrization of the nuclear structure function

TL;DR

This paper presents a phenomenological parametrization of the nuclear structure function based on QCD dynamics and proton data, effectively describing nuclear shadowing effects at high energies for various nuclei.

Contribution

It introduces a simple, QCD-based parametrization of the nuclear structure function derived from proton data, incorporating saturation effects and validated against experimental data.

Findings

Accurately describes nuclear shadowing at low x for different nuclei.

Predicts nuclear shadowing magnitudes for various kinematic regions.

Provides a reliable ratio of nuclear to proton structure functions at high energies.

Abstract

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 parameterization 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 NMC, EMC and E665 Collaborations demonstrate that the suggested method by N.Armesto, C.A.Salgado and U.A. Wiedemann (ASW model) provides reliable ratio of nuclear structure functions $F_{2}^{A}/AF^{p}_{2}$ 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 analysis of ultra-high energy processes by future experiments at electron-ion colliders.