摘要: Triple-scattering experiments may be used to get additional information about the spin-dependence of scattering matrix second scatterer. In general two new parameters describing determined by means distinct experiments, one in which successive planes are parallel and at right angles each other. The relation between these is given for cases protons scattered from a spin-zero target proton-proton scattering. For former case magnitude left-right asymmetry third calculated on basis phenomenological model due Fermi Born approximation. Further experimental possibilities $p\ensuremath{-}p$ discussed.