Meson propagators in spontaneously broken gauge theories
arXiv:hep-ph/0107103
Abstract
Contrary to common belief, the longitudinal vector meson and scalar meson propagators have very different forms in spontaneously broken gauge theories. We choose the Abelian-Higgs model as an example and show that the longitudinal vector meson and scalar meson propagators have double poles by an extensive use of the Ward-Takahashi identities.
8 pages, ReVTeX