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

Abstract

The pseudoscalar current-delta transition form factors are calculated in the framework of relativistic baryon chiral perturbation theory including order O(q) . The complex-mass scheme, which is suitable and well-defined for unstable particles, is taken into account as a renormalization scheme. We discuss the low energy behavior of the pseudoscalar g̃(Q) and h̃(Q) form factors and note that the momentum dependence of the form factors is dominated by the pion pole contributions.