Pseudoscalar form factors of the ∆(1232) in Baryon Chiral Perturbation Theory

Özet

The pseudoscalar current-delta transition form factors are calculated in the framework of relativistic baryonchiral perturbation theory including order $\mathcal O(q^4)$. The complex-mass scheme, which is suitable and well-defined forunstable particles, is taken into account as a renormalization scheme. We discuss the low energy behavior of thepseudoscalar $\widetilde g(Q^2)$ and $\widetilde h(Q^2)$ form factors and note that the momentum dependence of the form factors is dominatedby the pion pole contributions.