Abstract

This article presents the ratio of the yields of antiprotons to protons in pp collisions as measured by the ALICE experiment at = 0.9 and 7 TeV. The ratio is measured to be R|y|<0.5 = 0.957 ± 0.006(stat.) ± 0.014(syst.) at 0.9 TeV and R|y|<0.5 = 0.991 ± 0.005(stat.) ± 0.014(syst.) at 7 TeV independent of both rapidity and transverse momentum. The results are compared with theoretical predictions.

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