2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/206159Measurements of the Xi- and anti-Xi+ masses, mass differences, lifetimes and lifetime differences are presented. The anti-Xi+ sample used is much larger than those used previously for such measurements. In addition, the Xi production rates in Z -> b anti-b and Z -> q anti-q events are compared and the position xi* of the maximum of the xi distribution in Z -> q anti-q events is measured.20 pages, 6 figures, Accepted by Phys. Lett. BHigh Energy Physics - Experimenttext