Pion-pole term in electroproduction of off-mass-shell pions
Phys. Rev. D 28, 86 – Published 1 July, 1983
DOI: https://doi.org/10.1103/PhysRevD.28.86
Abstract
The dependence of the invariant amplitudes for electroproduction of off-mass-shell pions on the pion Born term is investigated when current-algebra Ward identities and PCAC (partial conservation of axial-vector current) are used to determine pion electroproduction invariant amplitudes. We show that an amplitude satisfying the Ward identities can be constructed starting from the usual Born terms which do not satisfy them and that this same amplitude will be obtained for a large class of input Born terms.