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تسجيل مستخدم جديدSearch for CP Violation in Charged-Xi and Lambda Hyperon Decays
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We have compared the proton and antiproton angular distributions in 117 million Xi-minus -> Lambda + pi-minus -> proton + pi-minus + pi-minus and 41 million anti-Xi-minus -> anti-Lamba + pi-plus -> antiproton + pi-plus + pi-plus decays using a subset of the data from the HyperCP experiment (E871) at Fermilab. We find no evidence of CP violation, with the direct-CP-violating parameter $A_{XiLambda} = frac{alpha_{Xi}alpha_{Lambda} - bar{alpha}_{Xi}bar{alpha}_{Lambda}}{alpha_{Xi}alpha_{Lambda} + bar{alpha}_{Xi}bar{alpha}_{Lambda}} = [0.0+/-5.1(stat)+/-4.4(syst)]{times}10^{-4}$.
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