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Foamy Dark Matter from Monodromies
- Publication Year :
- 2019
- Publisher :
- arXiv, 2019.
-
Abstract
- We investigate the dynamics of axion-like particle (ALP) dark matter where the field range is enlarged by a monodromy. The monodromy potential allows sufficient production of dark matter also at larger couplings to the Standard Model particles. The potential typically features a number of "wiggles" that lead to a rapid growth of fluctuations. Using classical-statistical field theory simulations we go beyond the linear regime and treat the system in the non-linear and even non-perturbative regime. For sufficiently strong wiggles the initially homogeneous field is completely converted into fluctuations. The fluctuations correspond to dark matter particles with a non-vanishing velocity and we consider the corresponding restrictions from structure formation as well as the effects on today's dark matter density. Since all the dark matter is made up from these strong fluctuations, the dark matter density features large, $\mathcal{O}(1)$ fluctuations at scales $\lesssim 10^{6}\,{\rm km}\sqrt{{\rm eV}/m_a}$.<br />Comment: 26 pages, 8 figures; v2: extended discussion about the field ending up in the true vs false minimum, extended discussion about the field becoming inhomogeneous vs staying homogeneous, Fig. 8 updated, clarifications and references added, published version
- Subjects :
- Physics
Range (particle radiation)
Structure formation
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Field (physics)
010308 nuclear & particles physics
Dark matter
FOS: Physical sciences
Astronomy and Astrophysics
Astrophysics
01 natural sciences
Standard Model
High Energy Physics - Phenomenology
High Energy Physics - Phenomenology (hep-ph)
Monodromy
0103 physical sciences
Field theory (psychology)
Production (computer science)
Astrophysics - Cosmology and Nongalactic Astrophysics
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....5a381480cbc5fc665ee24e45de22d5dd
- Full Text :
- https://doi.org/10.48550/arxiv.1903.03116