Quark to $\Lambda$-hyperon spin transfers in the current-fragmentation region

Abstract

We perform a study on the struck quark to the $\Lambda$-hyperon fragmentation processes by taking into account the anti-quark fragmentations and intermediate decays from other hyperons. We concentrate on how the longitudinally polarized quark fragments to the longitudinally polarized $\Lambda$, how unpolarized quark and anti-quark fragment to the unpolarized $\Lambda$, and how quark and anti-quark fragment to the $\Lambda$ through the intermediate decay processes. We calculate the effective fragmentation functions in the light-cone SU(6) quark-spectator-diquark model via the Gribov-Lipatov relation, with the Melosh-Wigner rotation effect also included. The calculated results are in reasonable agreement with the HERMES semi-inclusive $ep$ experimental data and the OPAL and ALEPH $e^{+}{e}^{-}$ annihilation experimental data.

arXiv comment14 latex pages, 8 figures. Final version for publication in PLB

References in corpus (27)

• QCD Analysis of Unpolarized and Polarized Lambda - Baryon Production in Leading and Next-to-Leading Order
• Asymmetry of Lambda Baryons in Hadronic Z^0 Decays
• Melosh rotation: source of the proton's missing spin
• Polarized Lambdas in the Current Fragmentation Region
• The Proton Spin and the Wigner Rotation
• The Quark Spin Distributions of the Nucleon
• 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
• The Proton Spin Puzzle and $\Lambda$ Polarization in Deep--Inelastic Scattering
• Quark Structure of $\Lambda$ from $\Lambda$-Polarization in Z Decays
• Flavor and Spin Structure of $\Lambda$-Baryon at Large x
• The Flavor and Spin Structure of Hyperons from Quark Fragmentation
• Quark Flavor Separation in $\Lambda$-Baryon Fragmentation
• $\Lambda$, $\bar{\Lambda }$ Polarization and Spin Transfer in Lepton Deep-Inelastic Scattering
• Longitudinal Spin Transfer to the $\Lambda$ Hyperon in Semi-Inclusive Deep-Inelastic Scattering
• The strange quark spin of the proton in semi-inclusive $\Lambda$ leptoproduction
• Quark fragmentation functions in a diquark model for proton and $\Lambda$ hyperon production
• Asymmetric Quark/Antiquark Hadronization in e+e- Annihilation
• Helicity and Transversity Distribution of Nucleon and $\Lambda$-Hyperon from $\Lambda$ Fragmentation
• Lambda Polarization in Polarized Proton-Proton Collisions at RHIC
• Longitudinal Polarization of Lambda and anti-Lambda Hyperons in Lepton-Nucleon Deep-Inelastic Scattering
• Lambda and Lambda-bar polarization in polarized DIS
• Connection between Distribution and Fragmentation Functions
• Up and Down Quark Contributions to Spin Content of Lambda from Fragmentation
• Parton Densities and Fragmentation Functions from Polarized Lambda Production in Semi-Inclusive DIS
• The x-Dependent Helicity Distributions for Valence Quarks in Nucleons

Cited by in corpus (10)

• Leading and higher twist contributions in semi-inclusive e+e- annihilation at high energies
• Tensor polarization dependent fragmentation functions and e+e-\to V πX at high energies
• Isospin Symmetry of Fragmentation Functions
• Energy dependence of hadron polarization in $e^{+}{e}^{-}\to hX$ at high energies
• The Spin Alignment of Vector Mesons in High Energy pp Collisions
• Nucleon strange $s\bar{s}$ asymmetry to the $\Lambda /\bar{\Lambda }$ fragmentation
• Inclusive and semi-inclusive production of spin-3/2 hadrons in $e^{+}{e}^{-}$ annihilation
• Strange quark-antiquark asymmetry of nucleon sea from $\Lambda /\bar{\Lambda }$ polarization
• Kinked tracks from ${\Sigma }^{+}$ baryons as a probe of light quark polarizations
• Nuclear EMC effect through $\bar{\Lambda }/\Lambda$ production in semi-inclusive deep-inelastic scattering processes