Gravitational Particle Production in Gravity Theories with Non-minimal Derivative Couplings

Abstract

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.

23 pages, 12 figures, version to be published in JCAP

References in corpus (2)

• Quintessence and phantom cosmology with non-minimal derivative coupling
• Realistic cosmological scenario with non-minimal kinetic coupling

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