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Kaluza-Klein dark matter.

Hsin-Chia Cheng1, Jonathan L Feng, Konstantin T Matchev

  • 1Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637, USA.

Physical Review Letters
|November 22, 2002
PubMed
Summary
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Cold dark matter may consist of Kaluza-Klein particles. These particles offer promising avenues for detection through annihilation into positrons, neutrinos, and photons, differing from supersymmetric dark matter.

Area of Science:

  • Particle Physics
  • Cosmology
  • Astroparticle Physics

Background:

  • The nature of cold dark matter remains one of the most significant unsolved problems in physics.
  • Standard Model extensions are explored to explain dark matter's composition.
  • Kaluza-Klein theories propose extra spatial dimensions, offering new particle candidates.

Purpose of the Study:

  • To investigate Kaluza-Klein particles as a viable candidate for cold dark matter.
  • To explore the detection signatures of Kaluza-Klein dark matter.
  • To contrast the properties of Kaluza-Klein dark matter with other candidates like supersymmetric dark matter.

Main Methods:

  • Theoretical modeling of Kaluza-Klein gauge bosons within a framework of extra dimensions.
  • Analysis of particle annihilation channels, focusing on Kaluza-Klein parity conservation.

Related Experiment Videos

  • Evaluation of direct detection signals and astrophysical signatures.

    • Main Results:

    • The lightest Kaluza-Klein state is identified as a strong dark matter candidate under specific theoretical conditions.
    • Kaluza-Klein gauge bosons exhibit distinct annihilation patterns, producing hard positrons, neutrinos, and photons at unsuppressed rates.
    • Both annihilation and direct detection signals are found to be promising for Kaluza-Klein dark matter.

    Conclusions:

    • Kaluza-Klein particles provide a compelling alternative to other dark matter candidates.
    • The predicted annihilation and direct detection signals offer testable predictions for experimental searches.
    • The findings are generalizable to a broader class of bosonic dark matter candidates.