Proton-proton analyzing power and spin correlation measurements between 250 and 450 MeV at 7°≤θc.m.≤90° with an internal target in a storage ring

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

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Abstract

We have measured the pp spin correlation coefficients Axx, Axy, Axz and the analyzing power Ay at 250.0, 280.0, 294.4, 310.0, 350.0, 399.1, and 448.9 MeV over the laboratory angular range 3.5°-43.5° (θc.m. = 7°-90°). The statistical accuracy is approximately ±0.006 for Ay and ±0.02 for Amn per 1° angle bin, while the corresponding scale factor uncertainties are 1.3 and 2.5%, respectively. The experiment makes use of a polarized hydrogen gas target internal to a proton storage ring (IUCF Cooler) and a circulating beam of polarized protons. The method of calibration relative to pp spin correlation coefficients and analyzing power at 197.4 MeV, the injection energy, involves up and down ramping of the energy of the polarized beam. The data are compared to recent pp partial waves analyses and NN potential models, emphasizing in particular the energy dependence in the region of the pion production threshold.

Original languageEnglish (US)
Pages (from-to)1897-1912
Number of pages16
JournalPhysical Review C - Nuclear Physics
Volume58
Issue number4
StatePublished - Oct 1998
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Przewoski, B. V., Rathmann, F., Dezarn, W. A., Doskow, J., Dzemidzic, M., Haeberli, W., Hardie, J. G., Lorentz, B., Meyer, H. O., Pancella, P. V., Pollock, R. E., Rinckel, T., Sperisen, F., & Wise, T. (1998). Proton-proton analyzing power and spin correlation measurements between 250 and 450 MeV at 7°≤θc.m.≤90° with an internal target in a storage ring. Physical Review C - Nuclear Physics, 58(4), 1897-1912.