Dark Radiation Emerging After Big Bang Nucleosynthesis?

Abstract

We show how recent data from observations of the cosmic microwave background may suggest the presence of additional radiation density which appeared after big bang nucleosynthesis. We propose a general scheme by which this radiation could be produced from the decay of non-relativistic matter, we place constraints on the properties of such matter, and we give specific examples of scenarios in which this general scheme may be realized.

v3: 5 pages, 1 figure. References added, typos corrected, notation changed throughout. v2: 5 pages, 1 figure. Reformatted, references added, acknowledgments updated, effect of radiation on CMB clarified. v1: 11 pages, 1 figure

References in corpus (25)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Efficient Computation of CMB anisotropies in closed FRW models
• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• New Tools for Low Energy Dynamical Supersymmetry Breaking
• Dynamical Supersymmetry Breaking Simplified
• Dynamical Supersymmetry Breaking at Low Energies
• Relic neutrino decoupling including flavour oscillations
• Neutrinos in cosmology
• General Gauge Mediation
• Signatures of Relativistic Neutrinos in CMB Anisotropy and Matter Clustering
• The primordial abundance of 4He: evidence for non-standard big bang nucleosynthesis
• Probing cosmological parameters with the CMB: Forecasts from full Monte Carlo simulations
• Cosmology seeking friendship with sterile neutrinos
• A New Approach to Systematic Uncertainties and Self-Consistency in Helium Abundance Determinations
• Cosmological parameters from large scale structure - geometric versus shape information
• Constraining The Early-Universe Baryon Density And Expansion Rate
• The Impact of an Extra Background of Relativistic Particles on the Cosmological Parameters derived from Microwave Background Anisotropies
• Using BBN in cosmological parameter extraction from CMB: a forecast for Planck
• Increasing the effective number of neutrinos with decaying particles
• Cosmological implications of supersymmetric axion models
• Do observations prove that cosmological neutrinos are thermally distributed?
• Dark radiation as a signature of dark energy
• Hierarchies of Susy Splittings and Invisible Photinos as Dark Matter
• Decaying dark matter mimicking time-varying dark energy

Cited by in corpus (65)

• The Simons Observatory: Science goals and forecasts
• CMB-S4 Science Case, Reference Design, and Project Plan
• How Massless Neutrinos Affect the Cosmic Microwave Background Damping Tail
• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• A robust upper limit on N_eff from BBN, circa 2011
• Phases of New Physics in the CMB
• A New Target for Cosmic Axion Searches
• The Case for Dark Radiation
• New Light Species and the CMB
• Probing Physics Beyond the Standard Model: Limits from BBN and the CMB Independently and Combined
• keV Sterile Neutrino Dark Matter from Singlet Scalar Decays: Basic Concepts and Subtle Features
• Limits on Dark Radiation, Early Dark Energy, and Relativistic Degrees of Freedom
• Non-Thermal Dark Matter Mimicking An Additional Neutrino Species In The Early Universe
• A Hidden Dark Matter Sector, Dark Radiation, and the CMB
• Increasing Neff with particles in thermal equilibrium with neutrinos
• Cosmological Constraints on Interacting Light Particles
• A 331 WIMPy Dark Radiation Model
• Correlation between Dark Matter and Dark Radiation in String Compactifications
• Dark radiation from particle decay: cosmological constraints and opportunities
• The impact of a new median statistics $H_0$ prior on the evidence for dark radiation
• Dark Radiation from Particle Decays during Big Bang Nucleosynthesis
• Higgs-Dilaton cosmology: Are there extra relativistic species?
• Hidden Charged Dark Matter and Chiral Dark Radiation
• Dark Radiation or Warm Dark Matter from long lived particle decays in the light of Planck
• Dark radiation from the axino solution of the gravitino problem
• Excluding the Light Dark Matter Window of a 331 Model Using LHC and Direct Dark Matter Detection Data
• Probing dark radiation with inflationary gravitational waves
• Neutrino and Dark Radiation properties in light of latest CMB observations
• Improved constraint on the primordial gravitational-wave density using recent cosmological data and its impact on cosmic string models
• Non-thermal WIMPs as "Dark Radiation" in Light of ATACAMA, SPT, WMAP9 and Planck
• Are Light Sterile Neutrinos Preferred or Disfavored by Cosmology?
• Dark Radiation in extended cosmological scenarios
• Dark radiation and small-scale structure problems with decaying particles
• Origin of Delta N_eff as a Result of an Interaction between Dark Radiation and Dark Matter
• Testing standard and non-standard neutrino physics with cosmological data
• Constraints on Neutrino Mass and Light Degrees of Freedom in Extended Cosmological Parameter Spaces
• Mirror dark matter cosmology - predictions for $N_{eff}[CMB]$ and $N_{eff}[BBN]$
• Constraints on Axion-Lepton coupling from Big Bang Nucleosynthesis
• Isocurvature perturbations in extra radiation
• Constraining SUSY with Heavy Scalars -- using the CMB
• Dark Radiation and Decaying Matter
• Dark radiation and dark matter in supersymmetric axion models with high reheating temperature
• Non-Gaussian isocurvature perturbations in dark radiation
• A Parallel World in the Dark
• Is the CMB telling us that dark matter is weaker than weakly interacting?
• A Rich Tapestry: Supersymmetric Axions, Dark Radiation, and Inflationary Reheating
• Spectator field models in light of spectral index after Planck
• CMB signature of non-thermal Dark Matter produced from self-interacting dark sector
• Was Entropy Conserved between BBN and Recombination?
• Hierarchies of Susy Splittings and Invisible Photinos as Dark Matter
• Supersymmetric Partially Interacting Dark Matter
• A testable scenario of WIMPZILLA with Dark Radiation
• The Lambda CDM-model in quantum field theory on curved spacetime and Dark Radiation
• Daughters mimic sterile neutrinos (almost!) perfectly
• Implications Of A Dark Sector U(1) For Gamma Ray Bursts
• Prospects and Limitations for Constraining Light Relics with Primordial Abundance Measurements
• Natural Emergence of Cosmological Constant and Dark Radiation from Stephenson-Kilmister-Yang-Camenzind Theory of Gravity
• Comparison of results on $N_{\mathrm{eff}}$ from various Planck likelihoods
• Reconciling Cosmological Tensions with Inelastic Dark Matter and Dark Radiation in a $\mathbf{U}(1{)}_{\mathbf{D}}$ Framework
• Decoupled Sectors and Wolf-Rayet Galaxies
• Superheavy Dark Matter in Light of Dark Radiation
• Limits in late time conversion of cold dark matter into dark radiation
• Testing the effects from dark radiation
• Dark radiation from a unified dark fluid model
• Cosmic Neutrinos and Other Light Relics