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, 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
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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