Asymmetry of the π-p↑ elastic scattering in the central angular region at (1.4-2.1) GeV/c

The systematic measurements of the asymmetry in π-p↑ elastic scattering in the central angular region have been performed as the ITEP accelerator at momenta from 1.4 to 2.1 GeV/c. The goal of this work was to obtain detailed data for improvement of the partial-wave analysis (PWA) and baryon resonances systematics in the mass region of (1.9-2.2) GeV/c2. Large polarization effects are observed in the whole momentum range. The angular dependence varies considerably with momentum. The minimum position is displaced from cosΘcm=-0.1 to cosΘcm =-0.3 in the interval (1.43-2.0) GeV/c. The minimal asymmetry depends on momentum shows the minimum near 1.8 GeV/c. The asymmetry value in this point is close to -1. Starting from 2 GeV/c another minimum is observed at positive values of cosΘcm