"The properties of the tiniest particles should dictate what the Universe looks like, but all the cosmological data is telling us there must be something in addition to what we know about, dark matter particles that we haven’t yet identified."
There are no dark matter real particles in my opinion. Dark matter is a vacuum effect from clumping of virtual fermion-antifermion pairs. These pairs (closed vacuum fermion loops) have negative energy density and positive pressure. The positive pressure is 3 times the negative energy density in an isotropic distribution.
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