Regge theory and some aspects of duality are used in order to parametrize the meson-baryon coupling constants, including first-order $S{U}_3$-breaking effects. Five of the more relevant coupling constants are expressed in terms of three unknown constants, yielding two independent sum rules. An estimate of corrections due to $S{U}_3$ mass shifts is suggested.

• Received 10 February 1971

DOI:https://doi.org/10.1103/PhysRevD.4.173