Integral representation of the Feynman propagators of the Dirac fermions on the de Sitter expanding universe

The propagators of the Dirac fermions on the expanding portion of the ( 1 + 3 ) -dimensional de Sitter spacetime are considered as mode sums in momentum representation with a fixed vacuum of Bunch–Davies type. The principal result reported here is a new integral representation of the Feynman propaga...

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Veröffentlicht in:	The European physical journal. C, Particles and fields Particles and fields, 2018-09, Vol.78 (9), p.1-6, Article 769
1. Verfasser:	Cotaescu, Ion I
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy Astrophysics and Cosmology Elementary Particles Fermions Hadrons Heavy Ions Integrals Letter Measurement Science and Instrumentation Nuclear Energy Nuclear Physics Physics Physics and Astronomy Quantum Field Theories Quantum Field Theory Representations String Theory Universe
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Zusammenfassung:	The propagators of the Dirac fermions on the expanding portion of the ( 1 + 3 ) -dimensional de Sitter spacetime are considered as mode sums in momentum representation with a fixed vacuum of Bunch–Davies type. The principal result reported here is a new integral representation of the Feynman propagators of the massive and left-handed massless Dirac fields which can be used for deriving the Feynman rules of de Sitter QED in the Coulomb gauge or of an extended QFT.
ISSN:	1434-6044 1434-6052
DOI:	10.1140/epjc/s10052-018-6258-2