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.

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

References in corpus (3)

• Melosh rotation: source of the proton's missing spin
• Longitudinal Spin Transfer to the $\Lambda$ Hyperon in Semi-Inclusive Deep-Inelastic Scattering
• Longitudinal Polarization of Lambda and anti-Lambda Hyperons in Lepton-Nucleon Deep-Inelastic Scattering

Cited by in corpus (10)

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• 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