Gravitational dark matter production in Palatini preheating

Karam, Alexandros and Raidal, Martti and Tomberg, Eemeli (2021) Gravitational dark matter production in Palatini preheating. Journal of Cosmology and Astroparticle Physics, 2021 (3): 064. ISSN 1475-7516

Full text not available from this repository.

Abstract

We study preheating in plateau inflation in the Palatini formulation of general relativity, in a special case that resembles Higgs inflation. It was previously shown that the oscillating inflaton field returns to the plateau repeatedly in this model, and this leads to tachyonic production of inflaton particles. We show that a minimally coupled spectator scalar field can be produced even more efficiently by a similar mechanism. The mechanism is purely gravitational, and the scalar field mass can be of order 1013 GeV, larger than the Hubble scale by many orders of magnitude, making this a candidate for superheavy dark matter.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Cosmology and Astroparticle Physics
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3103
Subjects:
?? dark matter theoryinflationmodified gravityparticle physics-cosmology connectionastronomy and astrophysics ??
ID Code:
211965
Deposited By:
Deposited On:
31 Dec 2023 01:24
Refereed?:
Yes
Published?:
Published
Last Modified:
16 Jul 2024 00:41