MEASUREMENT OF THE SIGMA- POLARIZATION IN THE REACTION pi- + p-->SIGMA- + K+

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The average polarization of the {Sigma}{sup -} produced in the reaction {pi}{sup -} + p {yields} {Sigma}{sup -} + K{sup +} has been measured between center-of-mass angles 134{sup o} and 166{sup o} for an incident {pi}{sup -} momentum of 1145 MeV/c. A polarized proton target was used, and the {Sigma}{sup -} polarization was found by measuring the difference in the production-rate of K{sup +} mesons for protons polarized along the production-plane normal and against it. Spark chambers were used to record the {pi}{sup -} and K{sup +} trajectories, and the {pi}{sup -} momentum was obtained from a magnetic spectrometer while ... continued below

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14 p.

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Weldon, D.; Steiner, H.; Shapiro, G.; Schultz, C; Johnson, C.H.; Holloway, L. et al. October 1, 1967.

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The average polarization of the {Sigma}{sup -} produced in the reaction {pi}{sup -} + p {yields} {Sigma}{sup -} + K{sup +} has been measured between center-of-mass angles 134{sup o} and 166{sup o} for an incident {pi}{sup -} momentum of 1145 MeV/c. A polarized proton target was used, and the {Sigma}{sup -} polarization was found by measuring the difference in the production-rate of K{sup +} mesons for protons polarized along the production-plane normal and against it. Spark chambers were used to record the {pi}{sup -} and K{sup +} trajectories, and the {pi}{sup -} momentum was obtained from a magnetic spectrometer while the K{sup +} momentum was obtained from a range telescope. Each event was kinematically reconstructed in a one constraint fit to help eliminate events produced from protons bound in heavy nuclei of the target. The {Sigma}{sup -} polarization was found to be -0.36 {+-} 0.46.

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14 p.

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  • Journal Name: Physical Review; Journal Volume: 167; Journal Issue: 5; Related Information: Journal Publication Date: 03/1968

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  • Report No.: UCRL--17152-Rev.
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 932538
  • Archival Resource Key: ark:/67531/metadc898875

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • October 1, 1967

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  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 3, 2016, 8:12 p.m.

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Weldon, D.; Steiner, H.; Shapiro, G.; Schultz, C; Johnson, C.H.; Holloway, L. et al. MEASUREMENT OF THE SIGMA- POLARIZATION IN THE REACTION pi- + p-->SIGMA- + K+, article, October 1, 1967; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc898875/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.