Two-spin measurements of pion production near threshold

We have recently measured single pion production cross sections in proton-proton scattering with both beam and target polarized. These measurements were made at four beam energies between 325 and 400 MeV using the ''Cooler'' storage ring at IUCF in Bloomington, Indiana. This covers a region relatively close to threshold (η < 1) where only a few partial waves can contribute to the scattering. The spin dependence can be used to separate the contributions due to specific partial waves, even if angular distributions are statistically limited. Data have been taken for both the neutral and charged pion production, but only neutral pion data will be presented here, along with plans and prospects for the future. (author)