Ward-Takahashi Identidy on the Ligth-Front

Details Ward-Takahashi Identidy on the Ligth-Front Ward-Takahashi Identidy on the Ligth-Front

1997-10-02

arxiv.org/abs/hep-ph/9710226v1

Few Body Syst. 24 (1998) 99-107

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages,include two figures (fig1.eps and fig2.eps), use latex,epsf e-mail: naus@itp.uni-hannover.de, pacheco@axpfep1.if.usp.

Scientific paper

10.1007/s006010050080

The Ward-Takahashi identity, reflecting local gauge invariance, is perturbatively verified for a boson model in light front field theory. A careful integration over the light front energy, corresponding to exactly taking into account pair terms, which are the contributions of the zero longitudinal momentum mode, is crucial to obtain this result. Furthermore, the one-loop boson form factors are calculated for arbitrary off-shell momenta.

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