Angular distribution of the longitudinal p +(combining right arrow above)p + (combining right arrow above) spin correlation parameter Azz at 197.4 MeV

B. Lorentz, W. Haeberli, F. Rathmann, T. Wise, J. Doskow, M. Dzemidzic, H. O. Meyer, R. E. Pollock, B. Von Przewoski, T. Rinckel, F. Sperisen, P. V. Pancella

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Abstract

A polarized proton beam with a large longitudinal polarization component of 0.545 ± 0.005 (96% of the total polarization) was prepared in a storage ring (IUCF-Cooler). This was achieved by means of spin precession solenoids in two of the six straight sections of the ring. A polarized hydrogen storage cell target internal to the ring was used to measure the longitudinal spin correlation coefficient Azz in pp elastic scattering over the laboratory angular range 5.5°-43.5° (θc.m. = 11.5°-90°) with statistical errors of typically 0.025. The absolute normalization was determined to an accuracy of 2.0% by use of the identity Ayy-Axx-Azz≡1 at θc.m. = 90°. The identity also allows a reduction of the scale factor uncertainty of the previously published analyzing powers and spin correlation coefficients. The results are compared to recent pp partial wave analyses and NN potential models.

Original languageEnglish (US)
Article number054002
Pages (from-to)540021-540029
Number of pages9
JournalPhysical Review C - Nuclear Physics
Volume61
Issue number5
StatePublished - May 2000

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Lorentz, B., Haeberli, W., Rathmann, F., Wise, T., Doskow, J., Dzemidzic, M., Meyer, H. O., Pollock, R. E., Von Przewoski, B., Rinckel, T., Sperisen, F., & Pancella, P. V. (2000). Angular distribution of the longitudinal p +(combining right arrow above)p + (combining right arrow above) spin correlation parameter Azz at 197.4 MeV. Physical Review C - Nuclear Physics, 61(5), 540021-540029. [054002].