Year: 2017
Type: article
Abstract: The epochs of reheating and preheating are studied in a simple extension of the Starobinsky inflationary model, which consists of an [Formula: see text]-correction to the Einstein–Hilbert action and an additional scalar field. We find that if the [Formula: see text]-correction at the end of inflation is dynamically important, it affects the expansion rate and as a consequence, the reheating and preheating processes. While we find that the reheating temperature and duration of reheating are only slightly affected, the effect has to be taken into account when comparing the theory to data. In the case of preheating, the gravitational corrections can significantly affect the decay of the second field. We find that particle production is strongly affected for certain values of the parameters in the theory.
Authors: Carsten van de Bruck, Peter Dunsby, Laura E. Paduraru
Institutions: University of Sheffield, University of Cape Town
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: The Lancaster, Manchester, Sheffield Consortium for Fundamental Physics: Particle Physics, From the Universe to the LHC, The Lancaster, Manchester, Sheffield Consortium for Fundamental Physics: Particle Physics from the LHC to the Universe, Particle Physics: From the Early Universe to the Large Hadron Collider
OpenAlex ID: W2423317333