Relativistic dispersion relations are used to derive equations for low-energy S-, P-, and D-wave meson-nucleon scattering under the assumption that the (3,3) resonance dominates the dispersion integrals. The P-wave equations so obtained differ only slightly from those of the static fixed-source theory. The conclusions of the static theory are re-examined in the light of their new derivation.
© 1957 by The American Physical Society. Received 21 February 1957. This work was supported in part by the joint program of the Office of Naval Research and the U.S. Atomic Energy Commission.