Integral representation of the Feynman propagators of the Dirac fermions on the de Sitter expanding universe
West University of Timişoara, V. Pârvan Ave. 4, 300223, Timisoara, Romania
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Accepted: 18 September 2018
Published online: 25 September 2018
The propagators of the Dirac fermions on the expanding portion of the -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.
© The Author(s), 2018