Λ0 polarization as function of target density

Abstract

Λ0 polarization (P) depends on xf and pt; it depends also on the density of the target material: P(xf, pt, ρ) = (κ0/(λ0 + ρ/ρw))xf pt, with κ0 = −0.423 ± 0.065 (GeV/c)−1 and λ0 = 1.191 ± 0.200 in the range 0 < pt < 1.2 GeV. Here ρ is the target material density and ρw is the Tungsten density. From this equation, it follows that Λ0 polarization is reduced by target density.