Lightish but clumpy: scalar dark matter from inflationary fluctuations
arXiv:1807.09785 · doi:10.1088/1475-7516/2018/10/022
Abstract
It has recently been shown [1] that light vector particles produced from inflationary fluctuations can give rise to the dark matter in the Universe. A similar mechanism has been discussed in [2] for a non-minimally coupled scalar enjoying a Higgs portal interaction. We discuss in detail how such a generation of dark matter works in a minimal setup of a massive scalar non-minimally coupled to gravity. For suitable values of the non-minimal coupling any initial constant value of the field is suppressed during inflation. At the same time, the quantum fluctuations acquired during inflation give rise to a peaked energy density power spectrum. Isocurvature constraints can be avoided since nearly all of the energy is concentrated in fluctuations too small to be observed in the CMB. For masses and sufficiently high inflation scale the energy contained in these fluctuations is sufficient to account for the cold dark matter of the Universe. At small scales fluctuations are large and we therefore expect a rather clumpy nature of this form of dark matter.
A few clarifications and references added
References in corpus (16)
- Primordial Black Holes as Dark Matter
- New experimental approaches in the search for axion-like particles
- Review of LHC Dark Matter Searches
- The Stochastic Axion Scenario
- The QCD Axion Window and Low Scale Inflation
- Production of Purely Gravitational Dark Matter
- Gravitational Effects on Inflaton Decay
- On Thermal Gravitational Contribution to Particle Production and Dark Matter
- Astrophysical Effects of Scalar Dark Matter Miniclusters
- Axion minicluster power spectrum and mass function
- Quintessential Affleck-Dine baryogenesis with non-minimal couplings
- Scale-invariant scalar field dark matter through the Higgs portal
- Search for Bosonic Super-WIMP Interactions with the XENON100 Experiment
- Dark matter decay through gravity portals
- Fluctuations of the gravitational field generated by a random population of extended substructures
- Exploring ALPs beyond the canonical
Cited by in corpus (42)
- Wave Dark Matter
- Vector dark matter production at the end of inflation
- Production of Purely Gravitational Dark Matter: The Case of Fermion and Vector Boson
- Misalignment & Co.: (Pseudo-)scalar and vector dark matter with curvature couplings
- The Higgs Portal to Cosmology
- Despicable Dark Relics: generated by gravity with unconstrained masses
- Spectator Dark Matter
- Dark matter from scalar field fluctuations
- Trans-Planckian Censorship, Inflation and Dark Matter
- Symmetron Scalar Fields: Modified Gravity, Dark Matter or Both?
- Gravitational Production of Superheavy Dark Matter and Associated Cosmological Signatures
- Gravitational waves from global cosmic strings in quintessential inflation
- Open quantum dynamics induced by light scalar fields
- Impact of Higgs portal on gravity-mediated production of superheavy dark matter
- Charged Planckian Interacting Dark Matter
- Implications of time-dependent inflaton decay on reheating and dark matter production
- Foamy Dark Matter from Monodromies
- Cogenesis of Baryon Asymmetry and Gravitational Dark Matter from Primordial Black Holes
- ALP Dark Matter Mini-Clusters from Kinetic Fragmentation
- Non-thermal production of Dark Matter after Inflation
- Dark photon dark matter from a rolling inflaton
- Hidden Photon Dark Matter Interacting via Axion-like Particles
- Quantum interference in gravitational particle production
- Stochastic evolution of scalar fields with continuous symmetries during inflation
- Gravitational misalignment mechanism of Dark Matter production
- Gravitational Atoms
- Standard model Higgs field and hidden sector cosmology
- Challenging the Stability of Light Millicharged Dark Matter
- Primordial dark matter from curvature induced symmetry breaking
- Very Light Asymmetric Dark Matter
- Neutron star mass in dark matter clumps
- Dark Matter from Entropy Perturbations in Curved Field Space
- Minimal solution to the axion isocurvature problem from a nonminimal coupling
- Spectator dark matter in non-standard cosmologies
- Baryogenesis via Gravitational Spontaneous Symmetry Breaking
- Dark matter annihilation into leptons through gravity portals
- Can dark matter drive electroweak symmetry breaking?
- Light and Feebly Interacting Non-Abelian Vector Dark Matter Produced Through Vector Misalignment
- Phasing out of Darkness: From Sterile Neutrino Dark Matter to Neutrino Masses via Time-Dependent Mixing
- Purely gravitational dark matter production in warm inflation
- Observational constraints on dark matter decaying via gravity portals
- Probing Dark Matter Clumps, Strings and Domain Walls with Gravitational Wave Detectors