Integral representation of the scalar propagators on the de Sitter expanding universe

Autor: Ion I. Cotăescu, Ion Cotăescu
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: European Physical Journal C: Particles and Fields, Vol 79, Iss 8, Pp 1-6 (2019)
Druh dokumentu: article
ISSN: 1434-6044
1434-6052
DOI: 10.1140/epjc/s10052-019-7180-y
Popis: Abstract A new type of integral representation is proposed for the propagators of the massive Klein–Gordon field minimally coupled to gravity of the de Sitter expanding universe. This representation encapsulates the effects of the Heaviside step functions of the Feynman propagators, making possible for the first time the calculation of Feynman diagrams involving scalar particles on this background. In order to convince the reader, a simple example is given outlining as a premiere the amplitudes in the second order of perturbations of the Compton effect in the de Sitter scalar quantum electrodynamics.
Databáze: Directory of Open Access Journals
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