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 language||English (US)|
|Number of pages||16|
|Journal||Physical Review C - Nuclear Physics|
|State||Published - Oct 1998|
ASJC Scopus subject areas
- Nuclear and High Energy Physics