Proton-Proton Scattering below 50 MeV

A simple qualitative interpretation of the results of detailed phase shift analyses is attempted for the low energy p-p scattering. The following conclusions are obtained: In general, there are four sets of phase shift solutions, two of which correspond to the right sign of the tensor potential. One of them corresponds to the pure tensor potential, the other to a mixture of the tensor and the L. S potentials. To decide between these two possibilities the combined measurements of C nn and one of the triple scattering parameters are the most convenient and feasible experiments. It is also shown that a version of the pion potential proposed by Hamada et al. is compatible with the angular distribution below 5 MeV.