We present a microscopic derivation of the form factors of strong-interaction $\pi NN$ and $\pi N\Delta$ vertices within a relativistic constituent quark model. The results are compared with form factors from phenomenological meson-baryon models and recent lattice QCD calculations. We give an analytical representation of the vertex form factors suitable for applications in further studies of hadron reactions.

• Received 5 November 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.132002