New Source for QCD Axion Dark Matter Production: Curvature Induced

Abstract

We discuss a novel mechanism for generating dark matter from a fast-rolling scalar field, relevant for both inflation and rotating axion models, and apply it specifically to the (QCD) axion. Dark matter comes from scalar field fluctuations generated by the product of the curvature perturbation and the fast-rolling background field. These fluctuations can explain the totality of dark matter in a vast axion parameter space, particularly for the QCD axion, which will be targeted by upcoming experiments. We review the constraints on this mechanism and potential gravitational-wave signatures.

5 pages, 3 figures + appendix. Published in PRL

References in corpus (35)

• Planck 2018 results. X. Constraints on inflation
• Science Case for the Einstein Telescope
• Quintessential inflation
• Detector configuration of DECIGO/BBO and identification of cosmological neutron-star binaries
• Precision big bang nucleosynthesis with improved Helium-4 predictions
• Cosmology with the Laser Interferometer Space Antenna
• Conceptual Design of the International Axion Observatory (IAXO)
• Axions from Strings: the Attractive Solution
• More Axions from Strings
• Axion Kinetic Misalignment Mechanism
• The Large-Misalignment Mechanism for the Formation of Compact Axion Structures: Signatures from the QCD Axion to Fuzzy Dark Matter
• Axiogenesis
• Modeling Quintessential Inflation
• How warm are non-thermal relics? Lyman-$\alpha$ bounds on out-of-equilibrium dark matter
• The power spectrum on small scales: Robust constraints and comparing PBH methodologies
• How to constrain warm dark matter with the Lyman $\alpha$ forest
• Gravitational Wave and CMB Probes of Axion Kination
• The Irreducible Axion Background
• Predictions for Axion Couplings from ALP Cogenesis
• Cosmological Bound on the QCD Axion Mass, Redux
• Axion Kinetic Misalignment and Parametric Resonance from Inflation
• Strong constraints on decay and annihilation of dark matter from heating of gas-rich dwarf galaxies
• Axion Fragmentation
• New Perspectives on Axion Misalignment Mechanism
• Lepto-Axiogenesis
• Probing the Blue Axion with Cosmic Optical Background Anisotropies
• Conceptual Design of a New Large Superconducting Toroid for IAXO, the New International AXion Observatory
• Anisotropic cosmic optical background bound for decaying dark matter in light of the LORRI anomaly
• ALP Dark Matter Mini-Clusters from Kinetic Fragmentation
• CMB and Lyman-$\alpha$ constraints on dark matter decays to photons
• Post-inflationary axions: a minimal target for axion haloscopes
• Vanilla Inflation Predicts Negative Running
• A Spectroscopic Search for Optical Emission Lines from Dark Matter Decay
• Acoustic Misalignment Mechanism for Axion Dark Matter
• A universal bound on the duration of a kination era

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