Spin responses to pion quasifree acattering.

Parity conservation for the scattering of spin zero beams implies only transverse (S x q) spin transfer. This allows a decomposition of spin transfer S$=$0 and S$=$1 in terms of elementary spin amplitudes, similar to use of the Rosenbluth decomposition as used for relativistic electron scattering. For pion beams these amplitudes are known for scattering and charge exchange on nucleons, so a separation of spin and nonspin single nucleon responses is possible for quasifree pion scattering from nucleons within complex nuclei. A large body of pion quasifree data, with and without charge exchange, allows single-nucleon responses of complex nuclei to be determined across a wide range of nuclei for several pion beam energies. Nonspin intercepts and transverse spin slopes will be presented to test this concept for consistency and a summary will be provided.