Gravitational waves and dark photon dark matter from axion rotations
Journal Article
·
· Journal of High Energy Physics (Online)
- Univ. of Minnesota, Minneapolis, MN (United States); University of Minnesota
- Inst. for Advanced Study, Princeton, NJ (United States); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
- Univ. of Michigan, Ann Arbor, MI (United States)
An axion rotating in field space can produce dark photons in the early universe via tachyonic instability. This explosive particle production creates a background of stochastic gravitational waves that may be visible at pulsar timing arrays or other gravitational wave detectors. This scenario provides a novel history for dark photon dark matter. The dark photons may be warm at a level detectable in future 21-cm line surveys. For a consistent cosmology, the radial direction of the complex field containing the axion must be thermalized. We explore a concrete thermalization mechanism in detail and also demonstrate how this setup can be responsible for the generation of the observed baryon asymmetry.
- Research Organization:
- Univ. of Michigan, Ann Arbor, MI (United States); Univ. of Minnesota, Minneapolis, MN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Grant/Contract Number:
- SC0007859; SC0011842; SC0019225
- OSTI ID:
- 1837523
- Journal Information:
- Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 12 Vol. 2021; ISSN 1029-8479
- Publisher:
- Springer NatureCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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