Search For Cp Violation In Charged-Xi And Lambda Hyperon Decays

We have compared the p and (p) over bar angular distributions in 117x10(6) Xi(-)-->Lambdapi(-)-->ppi(-)pi(-) and 41x10(6) (Xi) over bar (+)--><<(Lambda)over bar>pi(+)-->(p) over bar pi(+)pi(+) 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)equivalent to(alpha(Xi)alpha(Lambda)-(alpha) over bar (Xi)(alpha) over bar (Lambda))/(alpha(Xi)alpha(Lambda)+(alpha) over bar (Xi)(alpha) over bar (Lambda))=[0.0+/-5.1(stat)+/-4.4(syst)]x10(-4).