A strongly interacting massive particle (SIMP) is a hypothetical particle that
interacts strongly between themselves and
weakly with ordinary matter, but could form the inferred
dark matter
In astronomy, dark matter is an invisible and hypothetical form of matter that does not interact with light or other electromagnetic radiation. Dark matter is implied by gravity, gravitational effects that cannot be explained by general relat ...
despite this.
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Strongly interacting massive particles have been proposed as a solution for the
ultra-high-energy cosmic-ray problem
[
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] and the absence of
cooling flows in galactic clusters.
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Various experiments and observations have set constraints on SIMP dark matter from 1990 onward.
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SIMP annihilations would produce significant heat.
DAMA set limits with NaI(Tl) crystals.
Measurements of
Uranus
Uranus is the seventh planet from the Sun. It is a gaseous cyan-coloured ice giant. Most of the planet is made of water, ammonia, and methane in a Supercritical fluid, supercritical phase of matter, which astronomy calls "ice" or Volatile ( ...
's heat excess exclude SIMPs from 150 MeV to 10
4 GeV.
[
] Earth's heat flow significantly constrains any cross section.
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See also
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References
Further reading
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{{Dark matter
Dark matter
Astroparticle physics
Hypothetical particles