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Cited by 560Dark Matter and Cosmic PhenomenaGalaxies: Formation, Evolution, PhenomenaCosmology and Gravitation Theories

Dark Matter Halos as Particle Colliders: Unified Solution to Small-Scale Structure Puzzles from Dwarfs to Clusters

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Kaplinghat, Manoj, Tulin, Sean, Yu, Hai-Bo·2016·Physical Review Letters
DOI 10.1103/physrevlett.116.041302
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Abstract

Astrophysical observations spanning dwarf galaxies to galaxy clusters indicate that dark matter (DM) halos are less dense in their central regions compared to expectations from collisionless DM N-body simulations. Using detailed fits to DM halos of galaxies and clusters, we show that self-interacting DM (SIDM) may provide a consistent solution to the DM deficit problem across all scales, even though individual systems exhibit a wide diversity in halo properties. Since the characteristic velocity of DM particles varies across these systems, we are able to measure the self-interaction cross section as a function of kinetic energy and thereby deduce the SIDM particle physics model parameters. Our results prefer a mildly velocity-dependent cross section, from σ/m≈2 cm^{2}/g on galaxy scales to σ/m≈0.1 cm^{2}/g on cluster scales, consistent with the upper limits from merging clusters. Our results dramatically improve the constraints on SIDM models and may allow the masses of both DM and dark mediator particles to be measured even if the dark sector is completely hidden from the standard model, which we illustrate for the dark photon model.

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  • These results place the constraint in mild tension with existing SIDM models that require σ/m ≳ 1 cm^2 g^-1 to resolve small-scale discrepancies in dwarf and spiral galaxies.

    “These results place our constraint in mild tension with existing SIDM models that require σ/m ≳ 1 cm 2 g -1 to resolve small-scale discrepancies in dwarf and spiral galaxies (J.Zavala et al. 2013;O. D. Elbert et al. 2015;M. Kaplinghat et al. 2016).”

    From A New Robust Constraint on the Self-interaction Cross Section of Dark Matter with Double Radio Relic Clusters (2026) · cites this paper as M. Kaplinghat et al. 2016

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Authors
Kaplinghat, M., Tulin, S., & Yu, H.-B.
Affiliations
  • University of California, Irvine (US)
  • York University (CA)
  • University of California, Riverside (US)
ORCID
Venue
Physical Review Letters
Publisher
American Physical Society (APS)
Published
2016-01-28
Volume
116
Issue
4
Pages
041302-041302
ISSN
  • 0031-9007 (ISSN-L)
  • 1079-7114
DOI
10.1103/physrevlett.116.041302
OpenAlex
W1962167320
Cited by
560
References
0
Citations by year
2026: 47 · 2025: 67 · 2024: 51 · 2023: 49 · 2022: 60 · 2021: 61 · 2020: 49 · 2019: 58 · 2018: 54 · 2017: 39 · 2016: 22 · 2015: 1
FWCI
24.58
Type
journal article
Language
en
Open access
Licence
Locations
  • Physical Review Letters (publishedVersion)
  • PubMed (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • arXiv (Cornell University)
Funders
  • National Science Foundation (PHY-1214648, PHY-1316792)
  • Natural Sciences and Engineering Research Council of Canada
  • U.S. Department of Energy (DE-SC0008541)
  • Kavli Institute for Theoretical Physics, University of California, Santa Barbara
Topics
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Dark Matter and Cosmic Phenomena
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Cosmology and Gravitation Theories
Keywords
self-interacting dark matter, dark matter halos, small-scale structure, dwarf galaxies, galaxy clusters, velocity-dependent cross section, dark photon, dark mediator, dark matter mass

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