TY - JOUR

T1 - R2-cosmology and new windows for superheavy dark matter

AU - Arbuzova, Elena

AU - Dolgov, Alexander

AU - Singh, Rajnish

N1 - Funding Information: This research was funded by RSF grant number 19-42-02004. Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/5

Y1 - 2021/5

N2 - Evolution and heating of the universe in R2-modified gravity are considered. It is shown that the universe’s history can be separated into four different epochs: (1) inflation, (2) heating due to curvature oscillations (scalaron decay), (3) transition to matter dominated period, and (4) conventional cosmology governed by General Relativity. Cosmological density of dark matter (DM) particles for different decay channels of the scalaron is calculated. The bounds on the masses of DM particles are derived for the following dominant decay modes: to minimally coupled scalars, to massive fermions, and to gauge bosons.

AB - Evolution and heating of the universe in R2-modified gravity are considered. It is shown that the universe’s history can be separated into four different epochs: (1) inflation, (2) heating due to curvature oscillations (scalaron decay), (3) transition to matter dominated period, and (4) conventional cosmology governed by General Relativity. Cosmological density of dark matter (DM) particles for different decay channels of the scalaron is calculated. The bounds on the masses of DM particles are derived for the following dominant decay modes: to minimally coupled scalars, to massive fermions, and to gauge bosons.

KW - Dark matter

KW - R-cosmology

KW - Scalaron decay

KW - Superheavy particles

KW - Universe heating

UR - http://www.scopus.com/inward/record.url?scp=85107009535&partnerID=8YFLogxK

U2 - 10.3390/sym13050877

DO - 10.3390/sym13050877

M3 - Review article

AN - SCOPUS:85107009535

VL - 13

JO - Symmetry

JF - Symmetry

SN - 2073-8994

IS - 5

M1 - 877

ER -