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Measurement of the $α$ asymmetry parameter for the $Ω^{-} \to Λ K^{-}$ Decay

Y. C. Chen¹, R. A. Burnstein⁵, A. Chakravorty⁵, A. Chan¹, W. S. Choong^2,7, K. Clark⁹, E. C. Dukes¹⁰, C. Durandet¹⁰, J. Felix⁴ et al. (HyperCP Collaboration)

J. Felix⁴, G. Gidal⁷, P. Gu⁷, H. R. Gustafson⁸, C. Ho¹, T. Holmstrom¹⁰, M. Huang¹⁰, C. James³, C. M. Jenkins⁹, D. M. Kaplan⁵, L. M. Lederman⁵, N. Leros⁶, M. J. Longo⁸, F. Lopez⁸, L. C. Lu¹⁰, W. Luebke⁵, K. B. Luk^2,7, K. S. Nelson¹⁰, H. K. Park⁸, J. -P. Perroud⁶, D. Rajaram⁵, H. A. Rubin⁵, P. K. Teng¹, J. Volk³, C. G. White⁵, S. L. White⁵, and P. Zyla⁷ (HyperCP Collaboration)

¹Institute of Physics, Academia Sinica, Taipei 11529, Taiwan, Republic of China
²University of California, Berkeley, California 94720, USA
³Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
⁴Universidad de Guanajuato, 37000 León, Mexico
⁵Illinois Institute of Technology, Chicago, Illinois 60616, USA
⁶Université de Lausanne, CH-1015 Lausanne, Switzerland
⁷Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
⁸University of Michigan, Ann Arbor, Michigan 48109, USA
⁹University of South Alabama, Mobile, Alabama 36688, USA
¹⁰University of Virginia, Charlottesville, Virginia 22904, USA

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Phys. Rev. D 71, 051102(R) – Published 10 March, 2005

DOI: https://doi.org/10.1103/PhysRevD.71.051102

Abstract

We have measured the $α$ parameter of the $Ω^{-} \to Λ K^{-}$ decay using data collected with the HyperCP spectrometer during the 1997 fixed-target run at Fermilab. Analyzing a sample of $0.96 \times 10^{6}$ $Ω^{-} \to Λ K^{-}$ , $Λ \to p π^{-}$ decays, we obtain $α_{Ω} α_{Λ} = [1.33 \pm 0.33 (s t a t) \pm 0.52 (s y s t)] \times 10^{- 2}$ . With the accepted value of $α_{Λ}$ , $α_{Ω}$ is found to be $[2.07 \pm 0.51 (s t a t) \pm 0.81 (s y s t)] \times 10^{- 2}$ .

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References (8)

V. E. Barnes et al., Phys. Rev. Lett. 12, 204 (1964).
M. Gell-Mann, in Proceedings of the International Conference on High-Energy Nuclear Physics, edited by J. Prentki (CERN, Geneva, 1962), p. 805.
M. Baubillier et al., Phys. Lett. 78B, 342 (1978); M. Deutschmann et al., ibid. 73B, 96 (1978).
S. Eidelman et al., Phys. Lett. B 592, 1 (2004).
M. Suzuki, Prog. Theor. Phys. 32, 138 (1964); Y. Hara, Phys. Rev. 150, 1175 (1966); J. Finjord, Phys. Lett. 76B, 116 (1978).
K. B. Luk, Ph.D. thesis, Rutgers University, 1983; K. B. Luk et al., Phys. Rev. D 38, 19 (1988).
R. A. Burnstein et al., hep-ex/0405034 [Nucl. Instrum. Methods (to be published)]; Y. C. Chen et al., Nucl. Instrum. Methods Phys. Res., Sect. A 455, 424 (2000).
G. Bunce, Nucl. Instrum. Methods 172, 553 (1980).

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Measurement of the $α$ asymmetry parameter for the $Ω^{-} \to Λ K^{-}$ Decay

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Measurement of the α asymmetry parameter for the Ω−→ΛK− Decay

Abstract

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References (8)

Measurement of the $α$ asymmetry parameter for the $Ω^{-} \to Λ K^{-}$ Decay