Non-thermal Axion Dark Radiation and Constraints
arXiv:1607.06958 · doi:10.1103/PhysRevD.94.065030
Abstract
The Peccei-Quinn mechanism presents a neat solution to the strong CP problem. As a by-product, it provides an ideal dark matter candidate, "the axion", albeit with a tiny mass. Axions therefore can act as dark radiation if excited with large momenta after the end of inflation. Nevertheless, the recent measurement of relativistic degrees of freedom from cosmic microwave background radiation strictly constrains the abundance of such extra relativistic species. We show that ultra-relativistic axions can be abundantly produced if the Peccei-Quinn field was initially displaced from the minimum of the potential. This in lieu places an interesting constraint on the axion dark matter window with large decay constant which is expected to be probed by future experiments. Moreover, an upper bound on the reheating temperature can be placed, which further constrains the thermal history of our Universe.
arXiv comment12 pages, 2 figures; v2: typos corrected, text modified, to appear in PRD
References in corpus (68)
- String Axiverse
- An Improved Experimental Limit on the Electric Dipole Moment of the Neutron
- Relic neutrino decoupling including flavour oscillations
- The QCD axion, precisely
- Exploring the String Axiverse with Precision Black Hole Physics
- Reheating in Inflationary Cosmology: Theory and Applications
- Discovering the QCD Axion with Black Holes and Gravitational Waves
- Revisiting the bound on axion-photon coupling from Globular Clusters
- Assisted inflation
- Structure of Resonance in Preheating after Inflation
- A Revised Experimental Upper Limit on the Electric Dipole Moment of the Neutron
- Production of massive particles during reheating
- Cosmic Axion Spin Precession Experiment (CASPEr)
- Axion dark matter from topological defects
- Particle physics models of inflation and curvaton scenarios
- Particle Physics from Stars
- Cosmological consequences of MSSM flat directions
- Axion Cosmology Revisited
- Gauge invariant MSSM inflaton
- Assisted inflation via tachyon condensation
- Neutrino and axion bounds from the globular cluster M5 (NGC 5904)
- MSSM flat direction inflation: slow roll, stability, fine tunning and reheating
- Preheating of Fermions
- Production of dark matter axions from collapse of string-wall systems
- Equation of state and Beginning of Thermalization After Preheating
- Goldstone Bosons as Fractional Cosmic Neutrinos
- Dark Radiation in LARGE Volume Models
- Thermal axion production
- Revisiting the axion bounds from the Galactic white dwarf luminosity function
- Dark Matter from Early Decays
- Axion cosmology with long-lived domain walls
- On the Theory of Fermionic Preheating
- Update of axion CDM energy density
- New cosmological mass limit on thermal relic axions
- On Axion Thermalization in the Early Universe
- Hard Art of the Universe Creation
- Axion cold dark matter in non-standard cosmologies
- Can Decaying Particles Raise the Upperbound on the Peccei-Quinn Scale?
- Dark Radiation and Dark Matter in Large Volume Compactifications
- Thermal axion production in the primordial quark-gluon plasma
- Axion dark matter in the post-inflationary Peccei-Quinn symmetry breaking scenario
- Cosmological Axion and neutrino mass constraints from Planck 2015 temperature and polarization data
- Axion hot dark matter bounds after Planck
- Reheating for Closed String Inflation
- Cosmological implications of supersymmetric axion models
- Moduli-Induced Axion Problem
- The Helium-Core Mass at the Helium Flash in Low-Mass Red Giant Stars: Observations and Theory
- Coupled Boltzmann computation of mixed axion neutralino dark matter in the SUSY DFSZ axion model
- Dynamics of Peccei-Quinn Breaking Field after Inflation and Axion Isocurvature Perturbations
- Non-perturbative production of matter and rapid thermalization after MSSM inflation
- The abundance of relativistic axions in a flaton model of Peccei-Quinn symmetry
- Domain wall and isocurvature perturbation problems in axion models
- Dark Radiation Constraints on Mixed Axion/Neutralino Dark Matter
- Dark Radiation predictions from general Large Volume Scenarios
- Quantifying the reheating temperature of the universe
- Dark Radiation and Inflationary Freedom after Planck 2015
- Scalar Trapping and Saxion Cosmology
- High-Scale Axions without Isocurvature from Inflationary Dynamics
- Tuned MSSM Higgses as an inflaton
- Dark Radiation in Anisotropic LARGE Volume Compactifications
- General Analysis of Dark Radiation in Sequestered String Models
- Axions as Hot and Cold Dark Matter
- Loop corrections to Delta N_eff in large volume models
- A Rich Tapestry: Supersymmetric Axions, Dark Radiation, and Inflationary Reheating
- Non-Gaussianity from Attractor Curvaton
- The Axiverse induced Dark Radiation Problem
- On the applicability of approximations used in calculation of spectrum of Dark Matter particles produced in particle decays
- Non-perturbative over-production of axion-like-particles (ALPs) via derivative interaction
Cited by in corpus (6)
- Physics potential of the International Axion Observatory (IAXO)
- Cosmic infrared background excess from axion-like particles and implications for multi-messenger observations of blazars
- Impact of high-scale Seesaw and Leptogenesis on inflationary tensor perturbations as detectable gravitational waves
- Two sides of the same coin: sterile neutrinos and dark radiation. Status and perspectives
- Diraxiogenesis
- Wormhole-Induced ALP Dark Matter