Study of spin-dependent structure functions of $^3{\rm He}$ and $^3{\rm H}$ at NNLO approximation and corresponding nuclear corrections

TL;DR

This paper extracts polarized structure functions of nucleons and light nuclei at NNLO, incorporating nuclear corrections, and compares results with recent high-precision experimental data to improve understanding of spin-dependent nuclear structure.

Contribution

It provides a novel NNLO analysis of polarized structure functions for $^3{ m He}$ and $^3{ m H}$, including nuclear corrections and comparison with recent experimental data.

Findings

Nucleon polarized structure functions are accurately determined at NNLO.

Nuclear corrections significantly affect the polarized structure functions at various $x$ values.

Results agree well with recent experimental measurements.

Abstract

We determine polarized parton distribution functions (PPDFs) and structure functions from recent experimental data of polarized deep inelastic scattering (DIS) on nuleons at next-to-next-to-leading order (NNLO) approximation in perturbative quantum chromodynamic (pQCD). The nucleon polarized structure functions are computed using the Jacobi polynomial approach while target mass corrections (TMCs) are included in our fitting procedure. Having extracted the polarized spin structure functions, we extend our study to describe $^3{\mathrm He}$ and $^3{\mathrm H}$ polarized structure functions, as well as the Bjorken sum rule. We also explore the importance of the nuclear corrections on the polarized nuclear structure functions at small and large values of $x$. Our results are compared with the recent available and high precision polarized $^3{\mathrm He}$ and $^3{\mathrm H}$ experimental data.