arXiv:hep-ph/9710226·v1·High Energy Physics — Phenomenology
Ward-Takahashi Identidy on the Ligth-Front
H. W. L. Naus (Institute for Theoretical Physics, University of Hannover) · J. P. B. C de Melo (Instituto de Fisica da Universidade de Sao Paulo) · T. Frederico (Departamento de Fisica,ITA, Centro Tecnico Aeroespacial)
Abstract
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.
Comments: 11 pages,include two figures (fig1.eps and fig2.eps), use latex,epsf e-mail: naus@itp.uni-hannover.de, pacheco@axpfep1.if.usp.br and tobias@fis.ita.cta.br Submitted to Few-Body Systems (1997)