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

By Y C Chen, R A Burnstein, A Chakravorty, A Chan, W S Choong, K Clark, E C Dukes, C Durandet, J Félix, G Gidal, P Gu, H R Gustafson, C Ho, T Holmstrom, M Huang, C James, C M Jenkins, D M Kaplan, Leon Max Lederman, Nicolas Leros, M J Longo, F López, L C Lu, W Luebke, K B Luk, K S Nelson, H K Park, Jean-Pierre Perroud, D Rajaram, H A Rubin, P K Teng, J Volk, C G White, S L White and P Zyla


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}

Topics: Particle Physics - Experiment
Year: 2005
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Provided by: CERN Document Server
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