Search

The paper presents the experimental results on measurements of carbon analyzing power for polarized protons at momenta 1.36, 1.60, 1.78, 2.02 GeV/c and the carbon thickness 4.9, 19.4, 36.5 g/cm2. The data shows that the analyzing power does not depend on the thickness in the interval 19–36 g/cm2. The results of this experiment for carbon thickness 19.4 and 36.5 g/cm2 together with the Saclay data were used for parametrization over the momentum and the scattering angle. Proton polarization in the quasielastic scattering on carbon at 10.5° was also measured. The experiment was completed at the ITEP accelerator.

The ITEP-PNPI collaboration presents the first results of the spin rotation parameter A+ measurements in the second resonance region. The experiment was performed at the ITEP accelerator at a positive pion beam momentum 1.43 GeV/c for scattering angles θcm = 127° and 133°. The setup was based on a polarized proton target and a carbon-plate polarimeter. The obtained data is compared with the predictions of the existing partial-wave analyses.

Results of systematic measurements of the asymmetry parameter in the elastic scattering of pions on polarized protons at 1.4–2.1 GeV/ c in the backward hemisphere are presented together with a test of the isospin invariance of the data set available on pion-proton scattering in the investigated momentum range. The transversity isodoublet amplitudes at 1.98 and 2.07 GeV/ c are reconstructed. The obtained data, the isospin analysis and amplitude reconstruction results are compared with the current phase-shift analysis predictions.