Transverse Polarization of Hyperons Produced in Semi-Inclusive Deep Inelastic Scattering

Abstract

We study the transverse polarization of hyperons produced in semi-inclusive deep inelastic scattering, $ep\to e{\Lambda }^{\uparrow }X$, in the framework of the collinear twist-3 factorization. The cross section from the twist-3 distribution functions and the twist-3 quark fragmentation functions is computed in the leading order with respect to the QCD coupling constant. The constraint relations among the twist-3 FFs are taken into account to simplify the formula. The formula is relevant to large-$P_T$ hyperon production in the future Electron-Ion-Collider experiment.

Comments: 21 pages, 5 figures. Typos and figures corrected. Some discussions added. Final version to appear in Phys. Rev. D