Abstract

We systematically study the hadron longitudinal polarizations of the octet baryons at large z from quark fragmentations in e+e--annihilation, the polarized charged lepton deep inelastic scattering (DIS) process, and the 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 the 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 antihyperon) fragmentations, which might be related to the sea content of hyperons. ©2000 The American Physical Society.