Exchange mechanism of proton-proton scattering and the trend of polarized-beam cross sections at intermediate energies

We show how a few very general assumptions on the exchange mechanism in proton-proton scattering yield a simple description of the data recently obtained with the Argonne polarized beam. Predictions are presented for polarized cross sections in presently unexplored kinematic regions. We list the helicity amplitude decomposition of all possible observables in two tables.