Vector analyzing power measurement of pion scattering from polarized Li7 in the region of the Δ33 resonance

The inclusive vector analyzing power iT(11) of pi+ -->Li-7 elastic scattering and inelastic scattering to the 0.47 MeV excited state was measured at several angles for T-pi = 134, 164, and 194 MeV. The polarization effects were found to be small but non-zero, the trend of the data is well described by a coupled channels calculation. The results of the calculation are more sensitive to variations of the nuclear structure input than to variations of the reaction mechanism.