2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/215149We study the longitudinal polarization of the Sigma_bar and Xi_bar anti-hyperons in polarized high energy pp collisions at large transverse momenta, extending a recent study for the Lambda_bar anti-hyperon. We make predictions by using different parametrizations of the polarized parton densities and models for the polarized fragmentation functions. Similar to the Lambda_bar polarization, the Xi_bar0 and Xi_bar+ polarizations are found to be sensitive to the polarized anti-strange sea in the nucleon. The Sigma_bar- and Sigma_bar+ polarizations show sensitivity to the light sea quark polarizations, Δ\bar u(x) and Δ\bar d(x), and their asymmetry.17 pages, 9 figures,version to appear in PRDHigh Energy Physics - Phenomenologytext