The Proton Spin Puzzle and $\Lambda$ Polarization in Deep--Inelastic Scattering

Abstract

We point out that measurements of longitudinal $\Lambda$ polarization in the target fragmentation region of deep--inelastic $\nu N$ and $\mu N$ or $eN$ scattering may test dynamical mechanisms invoked to explain the proton spin puzzle. A previously-proposed model for polarized $\bar{s}s$ pairs in the proton wave function reproduces successfully the negative $\Lambda$ polarization found in the WA59 $\bar{\nu }N$ experiment, and makes predictions that could be tested in future $\mu N$ and $eN$ experiments.

16 pages, LaTeX, 9 eps figures uuencoded in separate file, typographical errors corrected

Cited by in corpus (45)

• Parton Fragmentation Functions
• QCD Analysis of Unpolarized and Polarized Lambda - Baryon Production in Leading and Next-to-Leading Order
• Polarized Lambdas in the Current Fragmentation Region
• Spin content of Lambda and its longitudinal polarization in $e^{+}{e}^{-}$ annihilation at high energies
• Chiral Quark Model of Nucleon Spin-Flavor Structure with SU(3) and Axial-U(1) Breakings
• 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
• The Quark Orbital Angular Momentum in a Light-Cone Representation
• Diffractive production of $\Lambda$ hyperons in the high-energy limit of strong interactions
• SIDIS in the target fragmentation region: polarized and transverse momentum dependent fracture functions
• Measurement of the Antilambda Polarization in nu_mu Charged Current Interactions in the NOMAD Experiment
• Longitudinal Spin Transfer to the $\Lambda$ Hyperon in Semi-Inclusive Deep-Inelastic Scattering
• Hadronic Probes of the Polarized Intrinsic Strangeness of the Nucleon
• Expected Polarization of $\Lambda$ particles produced in deep inelastic polarized lepton scattering
• Longitudinal Spin Transfer to $\Lambda$ and $\bar{\Lambda }$ Hyperons in Polarized Proton-Proton Collisions at $\sqrt{s}$ = 200 GeV
• A lattice study of the spin structure of the Lambda hyperon
• Core meets corona: a two-component source to explain Lambda and anti-Lambda global polarization in semi-central heavy-ion collisions
• Quark Distributions of Octet Baryons from SU(3) Symmetry
• Vortical susceptibility of finite-density QCD matter
• Lambda Polarization in Polarized Proton-Proton Collisions at RHIC
• Lambda and Lambda-bar polarization in polarized DIS
• Structure and Production of Lambda Baryons
• Longitudinal Polarization of Lambda and anti-Lambda Hyperons in Lepton-Nucleon Deep-Inelastic Scattering
• Probing Charge-Symmetry-Violating Quark Distributions in Semi-Inclusive Leptoproduction of Hadrons
• On the two-boson exchange corrections to parity-violating elastic electron-proton scattering
• Next to Leading Order QCD Corrections to Polarized $\Lambda$ Production in DIS
• Longitudinal polarization of hyperon and anti-hyperon in semi-inclusive deep-inelastic scattering
• Investigating Local Parity Violation in Heavy-Ion Collisions Using Lambda Helicity
• The Quark-Antiquark Asymmetry of the Nucleon Sea from $\Lambda$ and $\bar{\Lambda }$ Fragmentation
• Quark to $\Lambda$-hyperon spin transfers in the current-fragmentation region
• Semi-inclusive back-to-back production of a hadron pair and a single hadron in $e^{+}{e}^{-}$ annihilation
• Parton Densities and Fragmentation Functions from Polarized Lambda Production in Semi-Inclusive DIS
• Inclusive and semi-inclusive production of spin-3/2 hadrons in $e^{+}{e}^{-}$ annihilation
• Lambda polarization and single-spin left-right asymmetry in diffractive hadron-hadron collisions
• $q\to \Lambda$ Fragmentation Function and Nucleon Transversity Distribution in a Diquark Model
• Today's View on Strangeness
• Deep Exclusive Meson Production as a probe to the puzzle of $\Lambda$ hyperon polarization
• Hyperon Beta-Decay and Axial Charges of the Lambda in view of Strongly Distorted Baryon Wave-Functions
• Quark Fragmentation Functions in a Diquark Model for $\Lambda$ Production
• Strange quark-antiquark asymmetry of nucleon sea from $\Lambda /\bar{\Lambda }$ polarization
• Quark Flavor Tagging in Polarized Hadronic Processes
• The Proton Spin and Flavor Structure in the Chiral Quark Model
• Event-by-event correlations between $\Lambda$ ($\bar{\Lambda }$) hyperon global polarization and handedness with charged hadron azimuthal separation in Au+Au collisions at $\sqrt{s_{\text{NN}}}=27\text{ GeV}$ from STAR
• Two-component source to explain $\Lambda$ and $\bar{\Lambda }$ global polarization in non-central heavy-ion collisions