Ji, Chueng-RyongBakker, Bernard L. G.Choi, Ho-MeoyngSuzuki, Alfredo T. [UNESP]2014-05-272014-05-272013-05-07Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 87, n. 9, 2013.1550-79981550-2368http://hdl.handle.net/11449/75361Four-fermion operators have been used in the past to link the quark-exchange processes in the interaction of hadrons with the effective meson-exchange amplitudes. In this paper, we apply the similar idea of a Fierz rearrangement to the self-energy and electromagnetic processes and focus on the electromagnetic form factors of the nucleon and the electron. We explain the motivation of using four-fermion operators and discuss the advantage of this method in computing electromagnetic processes. © 2013 American Physical Society.engArtigo10.1103/PhysRevD.87.093004WOS:000318655700002Acesso aberto2-s2.0-848779698872-s2.0-84877969887.pdf