Gravitational particle production in gravity theories with non-minimal derivative couplings

Gravitational particle production in gravity theories with non-minimal derivative couplings

We study the gravitational production of heavy X-particles of mass of the order of the inflaton mass, produced after the end of inflation. We find that, in the presence of a derivative coupling of the inflaton field or of the X-field to the Einstein tensor, the number of gravitationally produced par...

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Veröffentlicht in:Journal of cosmology and astroparticle physics 2013-08, Vol.2013 (8), p.1-21
Hauptverfasser: Koutsoumbas, George, Ntrekis, Konstantinos, Papantonopoulos, Eleftherios
Format: Artikel
Sprache:eng
Schlagworte:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
COSMOLOGY
Couplings
Derivatives
GRAVITATION
Inflation
INFLATIONARY UNIVERSE
INFLATONS
Joining
MASS
Mathematical analysis
PARTICLE PRODUCTION
TENSORS
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Beschreibung
Zusammenfassung:We study the gravitational production of heavy X-particles of mass of the order of the inflaton mass, produced after the end of inflation. We find that, in the presence of a derivative coupling of the inflaton field or of the X-field to the Einstein tensor, the number of gravitationally produced particles is suppressed as the strength of the coupling is increased.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2013/08/027