The two-flavour Wess-Zumino model coupled to electromagnetism is treated as a constrained system using the Faddeev-Jackiw method. Expanding into series of powers of the pion fields and keeping terms up to second and third order we obtain Coulomb-gauge Lagrangian densities containing non-local terms. © 1995.
Paschalis, J. E., & Porfyriadis, P. I. (1995). Application of the Faddeev-Jackiw formalism to the gauged WZW model. Physics Letters B, 355(1–2), 171–177. https://doi.org/10.1016/0370-2693(95)00746-8