The spin structure function of the neutron

TL;DR

This paper discusses the neutron spin structure function $g_{1n}$, emphasizing the importance of measurements at larger $x$ values and reviewing nuclear correction methods for polarized helium-3 targets.

Contribution

It highlights the significance of exploring larger $x$ regions for $g_{1n}$ and reviews recent advances in nuclear correction techniques for polarized $^3$He data.

Findings

Importance of larger $x$ measurements for $g_{1n}$

Review of nuclear correction methods for polarized helium-3

Insights into the sign change of the neutron spin structure function

Abstract

The neutron spin structure function, $g_{1n}$, has been of considerable interest recently in connection with the Bjorken sum rule and the proton spin crisis. Work on this problem has concentrated on measurements at low-$x$. We recall the important, non-perturbative physics to be learnt by going instead to larger values of $x$ and especially from a determination of the place where the expected sign change occurs. Of course, in order to obtain neutron data one must use nuclear targets and apply appropriate corrections. In this regard, we review recent progress concerning the various nuclear corrections that must be applied to measurements on polarised $^3$He.