Pionic Content of Rho-N-N and Rho-N-Delta Vertex Functions

Details Pionic Content of Rho-N-N and Rho-N-Delta Vertex Functions Pionic Content of Rho-N-N and Rho-N-Delta Vertex Functions

1994-07-13

arxiv.org/abs/nucl-th/9407023v1

Phys.Lett. B335 (1994) 253-258; Erratum-ibid. B338 (1994) 521

Physics

Nuclear Physics

Nuclear Theory

9 pages, 2 figures will be furnished upon request; LA-UR-94-1262

Scientific paper

10.1016/0370-2693(94)90346-8

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 g_{\rho NN} that agrees with the meson-exchange-potential results. On the other hand, it predicts a smaller f_{\rho N\Delta} 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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