Nuclear EMC effect through Λ¯/Λ production in semi-inclusive deep-inelastic scattering processes

Abstract

We calculate $\mathrm{\ensuremath{\Lambda}}$ and $\overline{\mathrm{\ensuremath{\Lambda}}}$ 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 $({\overline{\mathrm{\ensuremath{\Lambda}}}}^{A}/{\mathrm{\ensuremath{\Lambda}}}^{A})/({\overline{\mathrm{\ensuremath{\Lambda}}}}^{D}/{\mathrm{\ensuremath{\Lambda}}}^{D})$ 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 $({\overline{\mathrm{\ensuremath{\Lambda}}}}^{A}/{\mathrm{\ensuremath{\Lambda}}}^{A})/({\overline{\mathrm{\ensuremath{\Lambda}}}}^{D}/{\mathrm{\ensuremath{\Lambda}}}^{D})$ is predicted to be different by these different models.