Mid-rapidity antibaryon-to-baryon ratios in pp and Pb-Pb collisions measured by the ALICE experiment

Measurement of the antibaryon-baryon ratios (B¯/B) at mid rapidity probes the baryon transport and the degree of baryon stopping in high-energy collisions, providing insight into the collision dynamics. In this paper, we discuss the measurement of different B¯/B ratios (p¯/p, Λ¯/Λ, Ξ¯+/Ξ−) in pp collisions at s=0.9,2.76,and7TeV and in Pb-Pb collisions at sNN=2.76 TeV, as a function of charged particle multiplicity, rapidity and transverse momentum. Results from pp and Pb-Pb collisions are presented and compared to models.