Nuclear EMC effect through $\bar{\Lambda}/\Lambda$ production in semi-inclusive deep-inelastic scattering processes

TL;DR

This paper investigates the nuclear EMC effect by analyzing the ratio of anti-Lambda to Lambda production in semi-inclusive deep-inelastic scattering, showing sensitivity to nuclear sea quark content and model-dependent predictions.

Contribution

It introduces a method to probe the nuclear EMC effect through $ar{ ext{Lambda}}/ ext{Lambda}$ ratios in semi-inclusive DIS, comparing three models to account for nuclear modifications.

Findings

The ratio $(ar{ ext{Lambda}}^{A}/ ext{Lambda}^{A})/(ar{ ext{Lambda}}^{D}/ ext{Lambda}^{D})$ varies with nuclear models.

Different models predict distinguishable ratios, indicating sensitivity to nuclear sea quark distributions.

The approach provides a new way to study the EMC effect using hyperon production data.

Abstract

We calculate $\Lambda$ and $\bar{\Lambda}$ hadron production cross sections in charged lepton semi-inclusive deep-inelastic scattering off nuclear target ($A$, using iron $\mathrm{Fe}$ as an example) and deuteron ($D$) target. The results show that the ratio $(\bar{\Lambda}^{A}/\Lambda^{A})/(\bar{\Lambda}^{D}/\Lambda^{D})$ is sensitive to the sea quark content of the nucleus. We adopt three different models to take the nuclear EMC effect into account. The ratio $(\bar{\Lambda}^{A}/\Lambda^{A})/(\bar{\Lambda}^{D}/\Lambda^{D})$ is predicted to be different by these different models.