Transverse ${\Lambda }^0$ polarization in inclusive quasi-real photoproduction: quark scattering model

Abstract

The transverse polarization of ${\Lambda }^0$ hyperons produced in the inclusive $ep$ reaction at the 27.6 GeV beam energy is assumed to appear mostly via scattering of the strange quark in a color field. Results of application of such an idea to the preliminary data of HERMES are presented. Contributions of ${\Sigma }^0$, $\Xi$, and ${\Sigma }^{\ast }$ resonances to the polarization are taken into account.

Comments: 5 pages, 5 figures, corrected according to version accepted by Physics of Atomic Nuclei