Measurement of the Alpha Asymmetry Parameter for the Omega- to Lambda K- Decay

HyperCP Collaboration: Y. C. Chen , R. A. Burnstein , A. Chakravorty , A. Chan , W. S. Choong , K. Clark , E. C. Dukes , C. Durandet

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J. Felix G. Gidal P. Gu H. R. Gustafson C. Ho T. Holmstrom M. Huang C. James C. M. Jenkins D. M. Kaplan L. M. Lederman N. Leros M. J. Longo F. Lopez L. C. Lu W. Luebke K. B. Luk K. S. Nelson H. K. Park J. P. Perroud D. Rajaram H. A. Rubin P. K. Teng J. Volk C. G. White S. L. White P. Zyla

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classification ✦ hep-ex

keywords alphalambdaomega-decayomegaparameterstatsyst

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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 alpha_Omega*alpha_Lambda = [1.33+/-0.33(stat)+/-0.52(syst)] x 10^{-2}. With the accepted value of alpha_Lambda, alpha_Omega is found to be [2.07+/-0.51(stat)+/-0.81(syst)] x 10^{-2}.

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Measurement of the Alpha Asymmetry Parameter for the Omega- to Lambda K- Decay

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