Gauge-invariant correlation functions

Joseph I Kapusta, T. Toimela

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


A formalism is discussed that gives correlation functions, the poles of which define the physical excitation spectrum in gauge theories. Fermionic excitations in QED are used as an example. The fermion spectrum in a high-temperature plasma is studied as an illustrative application of the formalism. The connection to kinetic theory is made.

Original languageEnglish (US)
Pages (from-to)3197-3199
Number of pages3
JournalPhysical Review D
Issue number10
StatePublished - 1989


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