Structure Function Moments of Proton and Neutron

TL;DR

This paper presents a phenomenological QCD analysis of proton and deuteron structure function moments, revealing insights into the d/u ratio at high-x, isospin effects of higher twists, and agreement with Lattice QCD.

Contribution

It provides new phenomenological results on structure function moments, including the d/u ratio at large-x and isospin dependence of higher twists, with comparison to Lattice QCD calculations.

Findings

d/u ratio approaches zero as x approaches 1

Higher twist contributions are isospin independent

Non-singlet moments agree with Lattice QCD data

Abstract

QCD-inspired phenomenological analysis of experimental moments of proton and deuteron structure functions F2 have been presented. The obtained results on the d/u ratio at large-x, isospin dependence of higher twists and comparison with Lattice QCD calculations were discussed. We remind shortly these results: the obtained ratio is consistent with the asymptotic limit d/u-->0 at x-->1, the total contribution of higher twists is found to be isospin independent and the non-singlet moments are in excellent agreement with the Lattice data. We present here some details of the analysis triggered by the public discussion.