Measurements of spin rotation parameter A in pion-proton elastic   scattering at 1.62 GeV/c
  The ITEP-PNPI collaboration presents the results of the measurements of the spin rotation parameter A in the elastic scattering of positive and negative pions on protons at P_beam = 1.62 GeV/c. The setup included a longitudinally-polarized proton target with superconductive magnet, multiwire spark chambers and a carbon polarimeter with thick filter. Results are compared to the predictions of partial wave analyses. The experiment was performed at the ITEP proton synchrotron, Moscow. 
I.G. Alekseev, P.E. Budkovsky, V.P. Kanavets, L.I. Koroleva, B.V.   Morozov, V.M. Nesterov, V.V. Ryltsov, D.N. Svirida, A.D....