Charge independence restrictions on some high energy two-body processes

Bounds due to isospin invariance have been considered for spin effects and for the unpolarized cross sections in some situations of experimental interest. Dynamical consequences like possible structure in the near- forward direction and some knowledge of the strength of the real part of the forward scattering amplitude follow in a model- independent way from these isospin bounds for the unpolarized differential cross sections for np to np scattering and K/sup +or-/n to K/sup +or-/n scattering at high energies. Useful bounds for the differential cross sections for high energy pn to pn scattering and for the high-energy reactions pi N to rho N and KN to K*(890)N (and also bounds for the full observed density matrix of the vector meson) have been illustrated. Some simple implications of the rotation of the reference axes (about the normal to the production plane) for the resonance density matrix bounds are pointed out. Some other applications are discussed. (38 refs).