Threshold resummation for polarized (semi-)inclusive deep inelastic scattering

TL;DR

This paper investigates how resumming large logarithmic corrections affects spin asymmetries in deep inelastic scattering, finding that while overall robust, resummation notably decreases asymmetries at high x, especially in semi-inclusive cases.

Contribution

It provides the first detailed analysis of resummation effects on polarized deep inelastic scattering asymmetries, highlighting their impact at high x and implications for polarized quark distribution extraction.

Findings

Resummation slightly alters overall asymmetries.

Significant decrease in asymmetries at high x.

More pronounced effects in semi-inclusive scattering.

Abstract

We explore the effects of the resummation of large logarithmic perturbative corrections to double-longitudinal spin asymmetries for inclusive and semi-inclusive deep inelastic scattering in fixed-target experiments. We find that the asymmetries are overall rather robust with respect to the inclusion of the resummed higher-order terms. Significant effects are observed at fairly high values of x, where resummation tends to decrease the spin asymmetries. This effect turns out to be more pronounced for semi-inclusive scattering. We also investigate the potential impact of resummation on the extraction of polarized valence quark distributions in dedicated high-x experiments.