Dark matter from scalar field fluctuations

Abstract

Dark matter (DM) may have its origin in a pre-Big Bang epoch, the cosmic inflation. Here, we consider for the first time a broad class of scenarios where a massive free scalar field unavoidably reaches an equilibrium between its classical and quantum dynamics in a characteristic time scale during inflation and sources the DM density. The study gives the abundance and perturbation spectrum of any DM component sourced by the scalar field. We show that this class of scenarios generically predicts enhanced structure formation, allowing one to test models where DM interacts with matter only gravitationally.

5 pages, 2 figures. v3: Fixed a typo in the definition of $n_{\delta }$, results unaffected

References in corpus (8)

• Ultralight scalars as cosmological dark matter
• The Dawn of FIMP Dark Matter: A Review of Models and Constraints
• Ultra Light Boson Dark Matter and Event Horizon Telescope Observations of M87*
• Higgs inflation with loop corrections in the Palatini formulation
• Isocurvature bounds on axions revisited
• Spectator Dark Matter
• The Spectrum of the Axion Dark Sector
• Relaxing the Cosmological Moduli Problem by Low-scale Inflation

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