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Particle components of dark matter

J Ellis1

  • 1Theoretical Physics Division, European Center for Nuclear Research, CH-1211 Geneva 23, Switzerland.

Proceedings of the National Academy of Sciences of the United States of America
|January 14, 1998
PubMed
Summary

Astrophysical dark matter candidates, including the lightest supersymmetric particle and axion, are reviewed. Ongoing experiments may detect these particles, with axions potentially detectable if they form the galactic halo.

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Area of Science:

  • * Particle physics and astrophysics
  • * Cosmology and dark matter research

Background:

  • * Dark matter constitutes a significant portion of the universe's mass.
  • * The nature of dark matter remains one of the most pressing mysteries in modern physics.
  • * Leading candidates include the lightest supersymmetric particle and the axion.

Purpose of the Study:

  • * To review current particle candidates for astrophysical dark matter.
  • * To discuss the constraints and detection prospects for these candidates.
  • * To reevaluate the implications of astrophysical observations on dark matter theories.

Main Methods:

  • * Review of theoretical predictions for dark matter candidates.
  • * Analysis of experimental constraints from particle accelerators.
  • * Examination of astrophysical observations, including Supernova 1987A and galactic halo searches.

Main Results:

  • * The lightest supersymmetric particle is constrained to be above 40 GeV by accelerator experiments.
  • * Ongoing searches across various experimental platforms offer a strong potential for its detection.
  • * A reevaluation of Supernova 1987A constraints suggests a viable window for axion detection if they constitute the galactic halo.

Conclusions:

  • * Both the lightest supersymmetric particle and the axion remain plausible dark matter candidates.
  • * Experimental and observational efforts are crucial for confirming or refuting these candidates.
  • * Future detections could resolve the dark matter enigma and advance our understanding of the universe.

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