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Early-Universe Simulations of the Cosmological Axion
Open accessAbstract
Ultracompact dark matter (DM) minihalos at masses at and below 10^{-12} M_{⊙} arise in axion DM models where the Peccei-Quinn (PQ) symmetry is broken after inflation. The minihalos arise from density perturbations that are generated from the nontrivial axion self-interactions during and shortly after the collapse of the axion-string and domain-wall network. We perform high-resolution simulations of this scenario starting at the epoch before the PQ phase transition and ending at matter-radiation equality. We characterize the spectrum of primordial perturbations that are generated and comment on implications for efforts to detect axion DM. We also measure the DM density at different simulated masses and argue that the correct DM density is obtained for m_{a}=25.2±11.0 μeV.
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Cited by
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Di Luzio, L., Giannotti, M., Nardi, E., & Visinelli, L. (2020) · Physics Reports · doi:10.1016/j.physrep.2020.06.002 · Cited by 657
Hui, L. (2021) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-120920-010024 · Cited by 373
Search for topological defect dark matter with a global network of optical magnetometers
Afach, S., Buchler, B. C., Budker, D., Dailey, C., Derevianko, A., Dumont, V., Figueroa, N. L., Gerhardt, I., Grujić, Z. D., Guo, H., et al. (2021) · Nature Physics · doi:10.1038/s41567-021-01393-y · Cited by 126
Metadata
- Authors
- Buschmann, M., Foster, J. W., & Safdi, B. R.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2020-04-24
- Volume
- 124
- Issue
- 16
- Pages
- 161103-161103
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W3019521815
- Cited by
- 228
- References
- 0
- FWCI
- 15.12
- Type
- journal article
- Language
- en
- Open access
- green
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