Measurement of the polarization parameter in $pi$$sup -$p backward elastic scattering at 6 GeV/c
Journal Article
·
· Nucl. Phys., B, v. B64, no. 2, pp. 45-57
OSTI ID:4396388
The polarization parameter in pi /sup -/p elastic scattering was measured in the backward angular region at an incident momentum of 6 GeV/c. The measurements cover the range of four momentum transfer u = 0 to --1 (GeV/c)/sup 2/ , and were obtained with a high intensity pion beam, a butanol polarized proton target, and arrays of scintillation counter hodoscopes. The polarization is different from zero, in contradiction to the prediction of the naive one trajectory Regge-exchange model. It increases positively with the four-momentum transfer u, reaching a maximum of about 0.4 at u approximately -- 0.3 (GeV/c)/ sup 2/. It then decreases and becomes slightly negative beyond u approximately -- 0.5 (GeV/c)/sup 2/. A variety of baryon exchange models are briefly reviewed and none are found to be in complete agreement with all the experimental data. (auth)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-29-011239
- OSTI ID:
- 4396388
- Journal Information:
- Nucl. Phys., B, v. B64, no. 2, pp. 45-57, Journal Name: Nucl. Phys., B, v. B64, no. 2, pp. 45-57; ISSN NUPBB
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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