Abstract
The lowest-order Tamm-Dancoff equations for the meson-nucleon system are derived by the method of Cini, using the wave functions defined by Dyson. The contributions of the meson and nucleon self-energies to the kernel of the momentum-space integral equation are renormalized. Their effects are absorbed into the coupling ${G}^{2}$, making it momentum and energy dependent. The effective coupling turns out to exhibit an anomalous behavior, having a pole for a spacelike momentum, to which it is difficult to attach a sensible physical interpretation.
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