Complete sets of spin observables in pion‐nucleon elastic scattering at 427–657 MeV/c

Recent measurements of the spin rotation parameters A and R for pion‐nucleon (πN) elastic scattering and analyzing powers for πN charge exchange at 427–657 MeV/c are presented. These measurements complete a program of πN experiments in this momentum region, marking the first time that complete data sets have been obtained at any momentum for this reaction. Comparisons are made with the recent SM88 partial wave analysis from VPI and the older Karlsruhe‐Helsinki and Carnegie‐Mellon‐Berkeley analyses.