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Equivalence of perturbation-theory techniques and the Bethe-Salpeter equation for summing Feynman diagrams

Research output: Contribution to journalJournal articlepeer-review

Published
<mark>Journal publication date</mark>15/07/1970
<mark>Journal</mark>Physical Review D
Issue number2
Volume2
Number of pages3
Pages (from-to)397-399
Publication StatusPublished
<mark>Original language</mark>English

Abstract

Polkinghorne's exact perturbation-theory equation for the leading Regge trajectory resulting from an infinite sum of ladder diagrams is shown to be mathematically equivalent to the partial-wave Bethe-Salpeter equation. Thus, the perturbation-theory equation can be used not only for the leading Regge trajectory, but for all secondary trajectories as well.