Global analysis on determination of fracture functions considering sea quark asymmetries in the nucleon

TL;DR

This paper analyzes HERA deep inelastic scattering data using fracture functions to extract nucleon fracture functions, providing a phenomenological parametrization and demonstrating good agreement with experimental results across various kinematic ranges.

Contribution

The study introduces a fracture functions framework to extract nucleon fracture functions from HERA DIS data, offering a new phenomenological parametrization at the input scale.

Findings

Nucleon fracture functions successfully describe leading-nucleon production in DIS.

Extracted parton distributions align well with experimental data.

The approach provides a consistent description across different kinematic variables.

Abstract

Several experiments at the electron-proton ($ep$) collider HERA have collected high precision data on the spectrum of leading-proton and leading-neutron carrying a large fraction of the proton's energy. In this paper, we have analyzed recent experimental data on the production of leading-nucleon in deep inelastic scattering (DIS) processes at HERA in the framework of a perturbative QCD (pQCD). An approach based on the fractures functions framework has been used, and the nucleon fracture functions (nucleon FFs) ${\cal M}_2^{(n/p)} (x, Q^2, x_L)$ have been extracted from global QCD analysis of DIS data measured by ZEUS collaboration at HERA. We show that the approach of fracture functions formalisem allows us phenomenologically parametrize the nucleon FFs at the input scale, $Q_0^2$. Considering leading-nucleon production data in the DIS processes, we present the results for the separate parton distributions for all parton species. The extracted results from the $t$-integrated leading-baryon fracture functions, $F_2^{\rm LB(3)} (x, Q^2, x_L)$ are in good agreement with all DIS data analyzed, for a wide range of longitudinal momentum fraction $x_L$ as well as scaled fractional momentum variable $x$.