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

HyperCP Collaboration; Chen, Y. C.; Burnstein, R. A.; Chakravorty, A.; Chan, A.; Choong, W. S.; Clark, K.; Dukes, E. C.; Durandet, C.; Felix, J.; Gidal, G.; Gu, P.; Gustafson, H. R.; Ho, C.; Holmstrom, T.; Huang, M.; James, C.; Jenkins, C. M.; Kaplan, D. M.; Lederman, L. M.; Leros, N.; Longo, M. J.; Lopez, F.; Lu, L. C.; Luebke, W.; Luk, K. B.; Nelson, K. S.; Park, H. K.; Perroud, J. P.; Rajaram, D.; Rubin, H. A.; Teng, P. K.; Volk, J.; White, C. G.; White, S. L.; Zyla, P.

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

Authors

HyperCP Collaboration

Description

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}.
5 pages, 4 figures, to be appeared as a Rapid Communication in Phys. Rev. D