The longitudinal polarization of hyperons in the forward region in polarized $pp$ collisions

Abstract

We study the longitudinal polarization of hyperons and anti-hyperons at forward pseudorapidity, $2.5<\eta <4$, in singly polarized $pp$ collisions at RHIC energies by using different parameterizations of the polarized parton densities and different models for the polarized fragmentation functions. The results show that the ${\Sigma }^{+}$ polarization is able to distinguish different pictures on spin transfer in high energy fragmentation processes; and the polarization of $\Lambda$ and $\bar{\Lambda }$ hyperons can provide sensitivity to the helicity distribution of strange sea quarks. The influence from beam remnant to hyperon polarization in the forward region is also discussed.

4 pages, 5 figures

References in corpus (6)

• PYTHIA 6.4 Physics and Manual
• Measurements of Strange Particle Production in $p+p$ Collisions at $\sqrt{s}$= 200 GeV
• Global Analysis of Helicity Parton Densities and Their Uncertainties
• Longitudinal Polarization of Lambda and anti-Lambda Hyperons in Lepton-Nucleon Deep-Inelastic Scattering
• Longitudinal polarization of hyperon and anti-hyperon in semi-inclusive deep-inelastic scattering
• Anti-Hyperon polarization in high energy pp collisions with polarized beams

Cited by in corpus (1)

• Nucleon strangeness polarization from $\Lambda /\bar{\Lambda }$ hyperon production in polarized proton-proton collision at RHIC