New Source for QCD Axion Dark Matter Production: Curvature Induced
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.
Authors
- Cem Eröncel (ORCID: https://orcid.org/0000-0002-9308-1449)
- Peera Simakachorn (ORCID: https://orcid.org/0000-0002-4274-1179)
- Ryosuke Sato (ORCID: https://orcid.org/0000-0003-2745-4208)
- Yann Gouttenoire (ORCID: https://orcid.org/0000-0003-2225-6704)
- Géraldine Servant (ORCID: https://orcid.org/0000-0002-3063-363X)
Institutions
- Osaka University of Economics (JP)
- Universität Hamburg (DE)
- Universitat de València (ES)
- Tel Aviv University (IL)
- Khon Kaen University (TH)
- Johannes Gutenberg University Mainz (DE)
- Deutsches Elektronen-Synchrotron DESY (DE)
- University Medical Center of the Johannes Gutenberg University Mainz (DE)
- Istinye University (TR)
- Institute of Theoretical Physics (CN)
Publication Details
- Journal
- Physical Review Letters
- Published
- 2025-11-04
- DOI
- https://doi.org/10.1103/s3t7-41t2
- Citations
- 6
- Primary Topic
- Dark Matter and Cosmic Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 11.22