Measurement of the Alpha Asymmetry Parameter for the Omega- to Lambda K- Decay
Abstract
We have measured the alpha parameter of the Omega- to Lambda K- decay using data collected with the HyperCP spectrometer during the 1997 fixed-target run at Fermilab. Analyzing a sample of 0.96 million Omega- to Lambda K-, Lambda to p pi- decays, we obtain alphaOmega*alphaLambda = [1.33+/-0.33(stat)+/-0.52(syst)] x 10-2. With the accepted value of alphaLambda, alphaOmega is found to be [2.07+/-0.51(stat)+/-0.81(syst)] x 10-2.
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