Bounds on polarization in πN scattering from isotopic spin invariance

Isotopic spin bounds on the polarization in π−p→πon scattering in terms of the polarizations in π+p→π+p and π−p→π−p scattering and the unpolarized differential cross-sections for π+p→π+p, π−p→π−p, and π−p→πon scattering are derived, and compared with recent experimental data. Similar bounds on the P, R and A parameters for elastic scattering are also given