The Flavor and Spin Structure of Hyperons from Quark Fragmentation

Abstract

We systematically study the hadron longitudinal polarizations of the octet baryons at large $z$ from quark fragmentations in $e^{+}{e}^{-}$-annihilation, polarized charged lepton deep inelastic scattering (DIS) process, and neutrino (antineutrino) DIS process, based on predictions of quark distributions for the octet baryons in the SU(6) quark-spectator-diquark model and a perturbative QCD based counting rule analysis. We show that the $e^{+}{e}^{-}$-annihilation and polarized charged lepton DIS process are able to distinguish between the two different predictions of the hyperon polarizations. We also find that the neutrino/antineutrino DIS process is ideal in order to study both the valence content of the hyperons and the antiquark to hyperon (quark to anti-hyperon) fragmentations, which might be related to the sea content of hyperons.

Comments: 32 latex pages, 11 figures, a misprint in Table 1 corrected, reference updated, to appear in PRD