A1 Refereed original research article in a scientific journal
Reheating via gravitational particle production in the kination epoch
Authors: Juho Lankinen, Oskari Kerppo, Iiro Vilja
Publisher: AMER PHYSICAL SOC
Publication year: 2020
Journal: Physical Review D
Journal name in source: PHYSICAL REVIEW D
Journal acronym: PHYS REV D
Article number: ARTN 063529
Volume: 101
Issue: 6
Number of pages: 10
ISSN: 2470-0010
eISSN: 2470-0029
DOI: https://doi.org/10.1103/PhysRevD.101.063529
Abstract
We provide a detailed study of reheating in the kination regime where particle content is created by gravitational production of massive scalars mutually interacting with a massless scalar field. The produced particles subsequently decay into massless particles eventually reheating the Universe. We aim for a more precise picture using Boltzmann equations and decay rates obtained by methods of quantum field theory in curved spacetime. By numerical calculations it is found that after inflation the Universe ends up being dominated by ordinary matter for a while before the radiation-dominated era. The reheating temperature is found to be in the 10(4)-10(12) GeV regime.
We provide a detailed study of reheating in the kination regime where particle content is created by gravitational production of massive scalars mutually interacting with a massless scalar field. The produced particles subsequently decay into massless particles eventually reheating the Universe. We aim for a more precise picture using Boltzmann equations and decay rates obtained by methods of quantum field theory in curved spacetime. By numerical calculations it is found that after inflation the Universe ends up being dominated by ordinary matter for a while before the radiation-dominated era. The reheating temperature is found to be in the 10(4)-10(12) GeV regime.
UTU Research Portal