Scalar dark matter production from the inflaton
Mathias Pierre
TL;DR
This paper investigates how scalar dark matter can be produced during cosmic inflation through direct inflaton coupling or gravitational interactions, providing new analytical insights and discussing cosmological constraints.
Contribution
It introduces a new analytical expression for the isocurvature power spectrum related to scalar dark matter production during inflation.
Findings
Dark matter can be generated via inflaton coupling or gravity during inflation.
New analytical formula for isocurvature power spectrum is derived.
Cosmological constraints on dark matter production are analyzed.
Abstract
A curved space-time is known to act as a source for particle production in environments where gravity plays a significant role. We explore this effect in a minimal setup of cosmic inflation on the production of a scalar dark matter candidate during and after the inflationary stage of the universe. We consider the production of dark matter via direct coupling to the inflaton field or from pure gravitational interactions. Cosmological constraints from structure formation and dark matter isocurvature perturbations are discussed. A new analytical expression for the isocurvature power spectrum is provided.
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