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Phys. Rev. D 58, 072002 (1998) [12 pages]

Measurement of the properties of the Ω̅ + and Ω- hyperons

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A. W. Chan and K. C. Cheng
Institute of Physics, Academia Sinica, Taipei, Taiwan 11529, Republic Of China

K. B. Luk*, C. James, and R. Rameika
Fermilab, Batavia, Illinois 60510

P. M. Ho, M. J. Longo, and A. Nguyen
Department of Physics, University of Michigan, Ann Arbor, Michigan 48109

J. Duryea, G. Guglielmo, K. Heller, and K. Johns§
School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455

H. T. Diehl**, S. Teige††, G. B. Thomson, and Y. Zou
Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854

(E756 Collaboration)

Received 26 March 1998; published 20 August 1998

We have analyzed Ω̅ + and Ω- events produced in the inclusive reaction p+Be→Ω+X and have measured some properties of the Ω̅ + and Ω- hyperons via the decay ΩΛKpπK. The measured Ω̅ + lifetime was τΩ̅ =(0.823±0.038)×10-10s(χ2/NDF=1.52), and the measured decay parameter was αΩ̅ =0.017±0.077(χ2/NDF=1.74). The corresponding values for the Ω- were τΩ=(0.817±0.022)×10-10s(χ2/NDF=1.17) and αΩ=-0.028±0.047(χ2/NDF=1.49). In addition, the measurement of the normalized mass difference between the Ω̅ + and Ω- yielded ΔMΩ/MΩ=(1.44±7.98)×10-5. The measurements were all in good agreement with CPT invariance.

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.58.072002
DOI:
10.1103/PhysRevD.58.072002
PACS:
14.20.Jn, 13.30.-a

*Current address: Department of Physics, University of California, Berkeley, CA 94720.

Current address: Lawrence Berkeley Laboratory, Berkeley, CA 94720.

Current address: Department of Physics and Astronomy, University of Oklahoma, Norman, OK 73019.

§Current address: Department of Physics, University of Arizona, Tucson, AZ 85721.

**Current address: Fermilab, Batavia, IL 60510.

††Current address: Department of Physics, Indiana University, Bloomington, IN 47405.