arXiv:1310.3295·v1·High Energy Physics — Phenomenology
Bethe-Salpeter Equations from the 4PI effective action
M.E. Carrington🇨🇦 · WeiJie Fu🇨🇦 · T. Fugleberg🇨🇦 · D. Pickering🇨🇦 · I. Russell🇨🇦
Abstract
In this paper we derive a hierarchy of integral equations from the 4PI effective action which have the form of Bethe-Salpeter equations. We show that, together with the equation of motion for the self-consistent 4-vertex, these integral equations are closed, and that their expansions give infinite series of connected diagrams which have the correct symmetry.
Comments: 20 pages, 13 figures