Measurement of the Alpha Asymmetry Parameter for the Omega- to Lambda K-   Decay
  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}. 
HyperCP Collaboration: Y. C. Chen, R. A. Burnstein, A. Chakravorty, A.   Chan, W. S. Choong, K. Clark, E. C. Dukes, C. Duran...