I 英文摘要 BESIII 实验上ψ(2S) →Ξ(1530)Ξ̅(1530)精确测量 Abstract The decays of ψ(2S) →Ξ(1530)Ξ̅(1530) have been studied using the 106×106 ψ(2S) events collected on BESIII experiment. The decays ψ(2S) →Ξ 0(1530)Ξ̅ 0(1530) and ψ(2S) →Ξ-(1530)Ξ̅+(1530) are observed for the first time in the world. The branching fraction ratio of ψ(2S) →Ξ 0(1530)Ξ̅ 0(1530) is measured to be (±(stat.)± (sys.))×10-5. The branching fraction ratio of ψ(2S) →Ξ-(1530)Ξ̅+(1530) is measured to be ( ± (stat.)) × 10-5. The measurements provide important experimental information to test the QCD theory. The BESI and CLEO collaborations have investigated the decay ψ(2S) →Ξ0(1530)Ξ̅0(1530), but no signal events are observed and the upper limit ×10-5 is determined. In our measurements, the statistical significance of the signal is larger than 9σ. The charged decay ψ(2S) →Ξ-(1530)Ξ̅+(1530) is observed for the first time in the world and its branching fraction ratio is measured precisely.