Measurement of $\Delta S$ in the nucleon at HERMES from semi-inclusive DIS

TL;DR

This paper reports on the measurement of the strange quark sea's helicity distribution in the proton using semi-inclusive deep-inelastic scattering of polarized charged kaons from a polarized deuterium target, providing insights into nucleon spin structure.

Contribution

It introduces a novel measurement of the strange quark helicity distribution in the nucleon via semi-inclusive DIS with charged kaons, enhancing understanding of nucleon spin composition.

Findings

Strange quark helicity distribution extracted from experimental data.

Results contribute to the understanding of nucleon spin structure.

Provides new data on polarized strange quark distributions.

Abstract

The helicity distribution of the strange quark sea in the proton has been extracted from measurements of polarized production of charged kaons in deep-inelastic scattering from a polarized deuterium target.