Strongly interacting massive particles (SIMPs) are hypothetical particles that
interact strongly between themselves and weakly with ordinary matter, but could form the inferred
dark matter
Dark matter is a hypothetical form of matter thought to account for approximately 85% of the matter in the universe. Dark matter is called "dark" because it does not appear to interact with the electromagnetic field, which means it does not ab ...
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. Its name is a reference to the Greek god of the sky, Uranus (mythology), Uranus (Caelus), who, according to Greek mythology, was the great-grandfather of Ares (Mars (mythology), Mars), grandfather ...
'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