Realistic pseudoscalar-vector Lagrangian. Static and dynamical baryon properties

We investigate electromagnetic and axial-vector currents and the corresponding form factors as well as meson-nucleon form factors within the framework of a nonlinear chiral Lagrangian constructed by Jain, Johnson, Meissner, Park, and Schechter in Phys. Rev. D 37, 3252 (1988). We employ an unambiguous procedure to construct the electroweak current densities. This brings in a parameter, related to the ω→${\pi }^0$γ decay rate, which does not appear in the strong-interaction part of the Lagrangian. This results in a fairly accurate description of the nucleons’ properties. The effects of coupling to a two-flavor ‘‘η meson’’ are shown to be small.