Ward-Takahashi Identidy on the Ligth-Front

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.

11 pages,include two figures (fig1.eps and fig2.eps), use latex,epsf e-mail: [email protected], [email protected] and [email protected] Submitted to Few-Body Systems (1997)

Cited by in corpus (14)

• Pair term in the Electromagnetic Current within the Front-Form Dynamics: Spin-0 Case
• Space-like and time-like pion electromagnetic form factor and Fock state components within the Light-Front dynamics
• Pion Eletromagnetic Current in the Ligth-Cone Formalism
• Electromagnetic form factor of the pion in the space- and time-like regions within the front-form dynamics
• Covariance of Light-Front Models: Pair Current
• Light-Front projection of spin-1 electromagnetic current and zero-modes
• Light-front Ward-Takahashi Identity for Two-Fermion Systems
• Regularization of fermion self-energy and electromagnetic vertex in Yukawa model within light-front dynamics
• Pion off-shell electromagnetic form factors: data extraction and model analysis
• Eletroweak Form Factors in the Light-Front for Spin-1 Particles
• Electromagnetic spin-1 form-factor free of zero-modes
• Covariant form factors for spin-1 particles
• Ward-Takahashi identity in the light-front formalism for a bound state of fermions
• Spin-1 particles and perturbative QCD