https://doi.org/10.1140/epjc/s10052-018-6258-2
Letter
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
* e-mail: i.cotaescu@e-uvt.ro
Received:
20
May
2018
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
