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.

arXiv comment4 pages, 5 figures

References in corpus (28)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• Models for the Polarized Parton Distributions of the Nucleon
• Measurements of Strange Particle Production in $p+p$ Collisions at $\sqrt{s}$= 200 GeV
• Global Analysis of Helicity Parton Densities and Their Uncertainties
• Prospects for Spin Physics at RHIC
• QCD Analysis of Unpolarized and Polarized Lambda - Baryon Production in Leading and Next-to-Leading Order
• Polarized Lambda-Baryon Production in pp Collisions
• Lambda and Lambda-bar Polarization in Lepton Induced Processes
• Spin content of Lambda and its longitudinal polarization in $e^{+}{e}^{-}$ annihilation at high energies
• Quark Structure of $\Lambda$ from $\Lambda$-Polarization in Z Decays
• The Flavor and Spin Structure of Hyperons from Quark Fragmentation
• Nucleon Transversity Distribution from Azimuthal Spin Asymmetry in Pion Electroproduction
• Spin structure and longitudinal polarization of hyperon in e+e- annihilation at high energies
• Intrinsic Polarized Strangeness and Lambda Polarization in Deep-Inelastic Production
• Longitudinal Spin Transfer to $\Lambda$ and $\bar{\Lambda }$ Hyperons in Polarized Proton-Proton Collisions at $\sqrt{s}$ = 200 GeV
• Anti-Lambda polarization in high energy pp collisions with polarized beam
• Lambda Polarization in Polarized Proton-Proton Collisions at RHIC
• Hyperon polarization in semi-inclusive deeply inelastic lepton-nucleon scattering at high energy
• Longitudinal Polarization of Lambda and anti-Lambda Hyperons in Lepton-Nucleon Deep-Inelastic Scattering
• Lambda and Lambda-bar polarization in polarized DIS
• Hyperon polarization in ν_μcharged current interaction at the NOMAD energies
• The CMB power spectrum at l=30-200 from QMASK
• Spin Transfers for Baryon Production in Polarized pp Collisions at RHIC-BNL
• Longitudinal polarization of hyperon and anti-hyperon in semi-inclusive deep-inelastic scattering
• Anti-Hyperon polarization in high energy pp collisions with polarized beams
• Probing gluon helicity distribution and quark transversity through hyperon polarization in singly polarized pp collisions
• Spin transfer and polarization of antihyperons in lepton induced reactions

Cited by in corpus (2)

• Nucleon strangeness polarization from $\Lambda /\bar{\Lambda }$ hyperon production in polarized proton-proton collision at RHIC
• Longitudinal spin transfer of Lambda and anti-Lambda in polarized pp collisions at \sqrt s=200 GeV at STAR