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Cited by 175

The DOI matches its Crossref record; 248 of the 248 references it cites were found in a registry or an index.

Large-misalignment mechanism for the formation of compact axion structures: Signatures from the QCD axion to fuzzy dark matter

Arvanitaki, Asimina, Dimopoulos, Savas, Galanis, Marios, Lehner, Luis, Thompson, Jedidiah O., Van Tilburg, Ken·2020·Physical Review D
DOI 10.1103/physrevd.101.083014
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Abstract

Axions are some of the best motivated particles beyond the Standard Model. We show how the attractive self-interactions of dark matter (DM) axions over a broad range of masses, from ${10}^{\ensuremath{-}22}\text{ }\text{ }\mathrm{eV}$ to ${10}^{7}\text{ }\text{ }\mathrm{GeV}$, can lead to nongravitational growth of density fluctuations and the formation of bound objects. This structure formation enhancement is driven by parametric resonance when the initial field misalignment is large, and it affects axion density perturbations on length scales of order the Hubble horizon when the axion field starts oscillating, deep inside the radiation-dominated era. This effect can turn an otherwise nearly scale-invariant spectrum of adiabatic perturbations into one that has a spike at the aforementioned scales, producing objects ranging from dense DM halos to scalar-field configurations such as solitons and oscillons. We call this class of cosmological scenarios for axion DM production ``the large-misalignment mechanism.'' We explore observational consequences of this mechanism for axions with masses up to 10 eV. For axions heavier than ${10}^{\ensuremath{-}5}\text{ }\text{ }\mathrm{eV}$, the compact axion halos are numerous enough to significantly impact Earth-bound direct detection experiments, yielding intermittent but coherent signals with repetition rates exceeding one per decade and crossing times less than a day. These episodic increases in the axion density and kinematic coherence suggest new approaches for axion DM searches, including for the QCD axion. Dense structures made up of axions from ${10}^{\ensuremath{-}22}\text{ }\text{ }\mathrm{eV}$ to ${10}^{\ensuremath{-}5}\text{ }\text{ }\mathrm{eV}$ are detectable through gravitational lensing searches, and their gravitational interactions can also perturb baryonic structures and alter star formation. At very high misalignment amplitudes, the axion field can undergo self-interaction-induced implosions long before matter-radiation equality, producing potentially-detectable low-frequency stochastic gravitational waves.

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Research works printed but not linked: 7

  1. I. I. Tkachev, 1986, Pisma Astron. Zh., 12, 726
  2. I. I. Tkachev, 1986, Sov. Astron. Lett., 12, 305
  3. I. I. Tkachev, 2015, Pis’ma Zh. Eksp. Teor. Fiz., 101, 3
  4. I. L. Bogolyubsky, 1976, Pis’ma Zh. Eksp. Teor. Fiz., 24, 15
  5. H. Poincaré, 1893, Les Méthodes Nouvelles de la Mécanique Céleste: Méthodes de MM. Newcomb, Glydén, Lindstedt et Bohlin. 1893
  6. S. M. Lewis, 2017, Proceedings, 12th Patras Workshop on Axions, WIMPs and WISPs (PATRAS 2016): Jeju Island, South Korea, 2016
  7. E. Silverstein, 2017, Proceedings, Theoretical Advanced Study Institute in Elementary Particle Physics: New Frontiers in Fields and Strings (TASI 2015): Boulder, CO, USA, 2015

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Metadata

Authors
Arvanitaki, A., Dimopoulos, S., Galanis, M., Lehner, L., Thompson, J. O., & Van Tilburg, K.
ORCID
Van Tilburg, Ken
Venue
Physical Review D
Publisher
American Physical Society (APS)
Published
2020-04-08
Volume
101
Issue
8
ISSN
  • 2470-0010
  • 2470-0029
DOI
10.1103/physrevd.101.083014
Cited by
175
References
248
Language
en
Licence
Funders
  • Natural Sciences and Engineering Research Council of Canada
  • Stavros Niarchos Foundation
  • National Science Foundation (PHYS-1720397, PHY-1620727, PHY-1748958)
  • Gordon and Betty Moore Foundation (GBMF7946, GBMF7392)
  • Government of Canada
  • Ontario Ministry of Economic Development and Innovation
  • Canadian Institute for Advanced Research
  • U.S. Department of Energy
  • Province of Ontario
  • Schmidt Fellowship (DE-SC0009988)

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