On creation of scalar particles with Gauss-Bonnet type coupling to curvature in Friedmann cosmological models

Abstract

Calculations are presented for creation of massive and massless scalar particles coupled to Gauss-Bonnet type curvature in Friedmann cosmological models. It has been shown that, for fields of mass~$m$, the effect of the coupling parameter $\zeta$ with the Gauss-Bonnet invariant is insignificant if $\zeta m^2\ll 1$. In all cases under consideration, the created particle number is compatible by order of magnitude with the number of causally disconnected space-time regions by the Compton time, corresponding $1/m$ or $\sqrt{\zeta }$.

6 pages, 3 figures

References in corpus (5)

• Matter Creation via Vacuum Fluctuations in the Early Universe and Observed Ultra-High Energy Cosmic Ray Events
• Do active galactic nuclei convert dark matter into visible particles?
• Superheavy Particles in Friedmann Cosmology and the Dark Matter Problem
• Cold dark matter and primordial superheavy particles
• Creation of the Nonconformal Scalar Particles in Nonstationary Metric