Propagators of the Dirac fermions in de Sitter expanding universe

Abstract

The propagators of the Dirac fermions are studied in the configuration representation on the expanding portion of the $(1+3)$-dimensional de Sitter spacetime considering a fixed vacuum of Bunch-Davies type. In this representation the method of Koksma and Prokopec [J. F. Koksma and T. Prokopec, Class. Quant. Grav. {\bf 26}, 125003 (2009)] is applied recovering thus the form of the propagators in the massive case but obtaining a new result for the left-handed massless fermions (neutrinos).

arXiv comment14 pages, no figures

Cited by in corpus (1)

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