Pion-Hydrogen Phase Shift Analysis between 120 and 217 Mev

An analysis has been made of the experimental angular distributions of negative pion---hydrogen scattering between 120 and 217 Mev. The usual assumptions of charge independence, and contributions from $S$ and $P$ waves only, are used and the six phase shifts determined as a function of energy by means of the Los Alamos MANIAC. The resulting phase shifts are used to predict positive pion---hydrogen scattering in this energy region. Comparison with the experimental data on positive pions enables one to exclude some of the sets of solutions obtained from the negative pion data.