Ideas of four-fermion operators in electromagnetic form factor calculations

作者:Ji Chueng Ryong*; Bakker Bernard L G; Choi Ho Meoyng; Suzuki Alfredo T
来源:Physical Review D - Particles, Fields, Gravitation and Cosmology, 2013, 87(9): 093004.
DOI:10.1103/PhysRevD.87.093004

摘要

Four-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.