Pionic Content of Rho-N-N and Rho-N-Delta Vertex Functions
Q. Haider, L. C. Liu
Abstract
The dynamical content of rho-N-N and rho-N-Delta vertex functions is studied with a mesonic model. A set of coupled integral equations satisfied by these vertex functions were solved self-consistently. These soulutions indicate that the dominant mesonic content arises from di-pion dynamics. With the experimentally determined pion-baryon-baryon coupling constants and ranges as input, the model predicts a gρNN that agrees with the meson-exchange-potential results. On the other hand, it predicts a smaller fρNΔ and much softer form factors. Implications of the findings on the use of phenomenological coupling constants in nuclear reaction studies are discussed.
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