| Autor: |
Steven Tepikian, S. Giordano, A. D. Krisch, P.A. Montemurro, R. R. Raylman, R. J. Nawrocky, A. M. T. Lin, S. Y. Lee, M. Fujisaki, Ahovi Kponou, Tatsushi Shima, Jay Roberts, Y.Y. Lee, J. F. Skelly, R. L. Witkover, F.Z. Khiari, G. T. Danby, H. J. Halama, G. R. Court, P. R. Cameron, L. G. Ratner, Th. Sluyters, M. Simonius, J. A. Bywater, D. Peaslee, D. G. Crabb, Thomas Roser, Kent M. Terwilliger, E. D. Courant, R. Lockey, R. L. Martin, L. C. Northcliffe, A. Soukas, M. E. Hejazifar, R. Lambiase, G.C. Phillips, R. S. Raymond, V. W. Hughes, L.A. Ahrens, J. R. O'Fallon, S. L. Linn, T. S. Bhatia, Kevin Brown, Yousef Makdisi, Peter Hansen, I. Gialas, J. G. Alessi, H. N. Brown, P. Schüler |
| Rok vydání: |
1989 |
| Předmět: |
|
| Zdroj: |
Physical Review D. 39:45-85 |
| ISSN: |
0556-2821 |
| DOI: |
10.1103/physrevd.39.45 |
| Popis: |
Accelerating polarized protons to 22 GeV/c at the Brookhaven Alternating Gradient Synchro- tron required both extensive hardware modifications and a difficult commissioning process. We had to overcome 45 strong depolarizing resonances to maintain polarization up to 22 GeV/c in this strong-focusing synchrotron. At 18.5 GeV/c we measured the analyzing power A and the spin-spin correlation parameter A/sub n//sub n/ in large- P/sub perpendicular//sup 2/ proton-proton elastic scattering, using the polarized proton beam and a polarized proton target. We also obtained a high-precision measurement of A at P/sub perpendicular//sup 2/ = 0.3 (GeV/c)/sup 2/ at 13.3 GeV/c. At 18.5 GeV/c we found that A/sub n//sub n/ = (-2 +- 16)% at P/sub perpendicular//sup 2/ = 4.7 (GeV/c)/sup 2/, where it was about 60% near 12 GeV at the Argonne Zero Gradient Synchrotron. This sharp change suggests that spin-spin forces may have a strong and unexpected energy dependence at high P/sub perpendicular//sup 2/. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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