Anti-Lambda polarization in high energy pp collisions with polarized beam

Abstract

We study the polarization of the anti-Lambda particle in polarized high energy pp collisions at large transverse momenta. The anti-Lambda polarization is found to be sensitive to the polarization of the anti-strange sea of the nucleon. We make predictions using different parameterizations of the polarized quark distribution functions. The results show that the measurement of longitudinal anti-Lambda polarization can distinguish different parameterizations, and that similar measurements in the transversely polarized case can give some insights into the transversity distribution of the anti-strange sea of nucleon.

11 pages, 4 figures

References in corpus (40)

• Models for the Polarized Parton Distributions of the Nucleon
• Measurements of the Proton and Deuteron Spin Structure Functions g1 and g2
• Precision Determination of the Neutron Spin Structure Function g1n
• Measurement of the Neutron Spin Structure Function $g_1^n$ with a Polarized ^3He Target
• Deep Inelastic Scattering of Polarized Electrons by Polarized ${}^3$He and the Study of the Neutron Spin Structure
• Measurements of the $Q^2$-Dependence of the Proton and Neutron Spin Structure Functions g1p and g1n
• Prospects for Spin Physics at RHIC
• Quark helicity distributions in the nucleon for up, down, and strange quarks from semi--inclusive deep--inelastic scattering
• QCD Analysis of Polarized Deep Inelastic Data and Parton Distributions
• Measurement of the Proton Spin Structure Function g1p with a Pure Hydrogen Target
• Measuring transversity densities in singly polarized hadron-hadron and lepton-hadron collisions
• Next-to-leading order QCD corrections to high-p_T pion production in longitudinally polarized pp collisions
• QCD Analysis of Unpolarized and Polarized Lambda - Baryon Production in Leading and Next-to-Leading Order
• Dynamical Parton Distributions Revisited
• Precision Measurement of the Neutron Spin Asymmetry $A_1^n$ and Spin-Flavor Decomposition in the Valence Quark Region
• Asymmetry of Lambda Baryons in Hadronic Z^0 Decays
• Flavor decomposition of the sea quark helicity distributions in the nucleon from semi-inclusive deep-inelastic scattering
• Polarized $q\to \Lambda$ Fragmentation Functions from $e^{+}{e}^{-}\to \Lambda +X^{\ast }$
• Longitudinal Polarized Parton Densities Updated
• Polarized Lambdas in the Current Fragmentation Region
• A New Evaluation of Polarized Parton Densities in the Nucleon
• Polarized Lambda-Baryon Production in pp Collisions
• Spin content of Lambda and its longitudinal polarization in $e^{+}{e}^{-}$ annihilation at high energies
• Lambda and Lambda-bar Polarization in Lepton Induced Processes
• Next-to-leading order QCD corrections to one hadron-production in polarized pp collisions at RHIC
• Lambda and Antilambda polarization from deep inelastic muon scattering
• Quark Structure of $\Lambda$ from $\Lambda$-Polarization in Z Decays
• The Flavor and Spin Structure of Hyperons from Quark Fragmentation
• Quark Flavor Separation in $\Lambda$-Baryon Fragmentation
• Nucleon Transversity Distribution from Azimuthal Spin Asymmetry in Pion Electroproduction
• $\Lambda$, $\bar{\Lambda }$ Polarization and Spin Transfer in Lepton Deep-Inelastic Scattering
• Measurement of Longitudinal Spin Transfer to Lambda Hyperons in Deep-Inelastic Lepton Scattering
• Spin structure and longitudinal polarization of hyperon in e+e- annihilation at high energies
• Intrinsic Polarized Strangeness and Lambda Polarization in Deep-Inelastic Production
• Can the polarization of the strange quarks in the proton be positive ?
• Hyperon polarization in semi-inclusive deeply inelastic lepton-nucleon scattering at high energy
• Hyperon polarization in ν_μcharged current interaction at the NOMAD energies
• The CMB power spectrum at l=30-200 from QMASK
• 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 (17)

• Flavor Structure of the Nucleon Sea
• Measurement of the Longitudinal Spin Transfer to Lambda and Anti-Lambda Hyperons in Polarised Muon DIS
• Longitudinal Spin Transfer to $\Lambda$ and $\bar{\Lambda }$ Hyperons in Polarized Proton-Proton Collisions at $\sqrt{s}$ = 200 GeV
• Transverse spin transfer to $\Lambda$ and $\bar{\Lambda }$ hyperons in polarized proton-proton collisions at $\sqrt{s}=200\mathrm{GeV}$
• Improved measurement of the longitudinal spin transfer to $\Lambda$ and $\bar{\Lambda }$ hyperons in polarized proton-proton collisions at $\sqrt{s}$ = 200 GeV
• The Spin Alignment of Vector Mesons in High Energy pp Collisions
• Several Topics on Transverse Momentum-Dependent Fragmentation Functions
• Longitudinal polarization of hyperon and anti-hyperon in semi-inclusive deep-inelastic scattering
• Anti-Hyperon polarization in high energy pp collisions with polarized beams
• Longitudinal and transverse spin transfer to $\Lambda$ and $\overline{\Lambda }$ hyperons in polarized $p$+$p$ collisions at $\sqrt{s}=200$ GeV
• Dihadron helicity correlation in photon-nucleus collisions
• Nucleon strangeness polarization from $\Lambda /\bar{\Lambda }$ hyperon production in polarized proton-proton collision at RHIC
• Predicting the $\sin {\varphi }_S$ Single-Spin-Asymmetry of $\Lambda$ Production off transversely polarized nucleon in SIDIS
• The longitudinal polarization of hyperons in the forward region in polarized $pp$ collisions
• Recent STAR results in high-energy polarized proton-proton collisions at RHIC
• Longitudinal spin transfer of Lambda and anti-Lambda in polarized pp collisions at \sqrt s=200 GeV at STAR
• Transverse Spin Transfer of $\Lambda$ and $\overline{\Lambda }$ Hyperons in Polarized $p$+$p$ Collisions at $\sqrt{s}=200$ GeV at RHIC-STAR