1305.5741 (George Koutsoumbas et al.)

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

George Koutsoumbas, Konstantinos Ntrekis, Eleftherios Papantonopoulos

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.

View original: http://arxiv.org/abs/1305.5741