Are hypothetical dark matter particles small black holes?

"This set of illustrations explains how a large black hole can form from the direct collapse of a massive cloud of gas within a couple of hundred million years after the Big Bang. Streams of gas, if they’re sufficiently cold, can lead to the direct collapse of a “seed” black hole of several tens of thousands (at least) of solar masses, which can form even prior to any stars forming in the surrounding young galaxy. As the galaxy and black hole grow, eventually the stellar mass content will outweigh the more slowly-growing black hole. Dark matter, which can’t become “cold” by shedding heat in the same way, can’t form a black hole similarly". (BigThink, Ask Ethan: Why doesn’t dark matter collapse due to gravity?)

Dark matter can form things like a cosmic net. In some theories, the dark matter is formed of weakly interacting massive particles, WIMPs. The reason why WIMP cannot interact can be in its quantum field. It's possible. That WIMP forms the quantum field that lets electromagnetic waves travel past it. 

That means the WIMP is like a stealth fighter.  But nobody saw WIMP yet. All interactions that are written about WIMPs are hypothetical. In some models, the WIMP is the primordial or very low-mass black hole. That explains its strange behavior. When the universe expands the WIMP looses its mass. This explains why that strange gravitational effect has no visible source. 

Maybe in the early, or young universe, high-level radiation turned some particles or even photons into black holes. That thing is not possible in our universe. But the kugelblitz-black hole can be possible in the young, very hot, and dense universe. 

But can dark matter form things like stars? That is a good question. In the early or young universe objects and materials were much denser than in the modern universe. The only known interaction between dark matter and visible material is gravitation. So if dark matter particles have some other mutual interaction than gravity. That is unknown. The material requires more than gravity to make things like molecules. 

Molecules form because of electromagnetic interactions. Without that interaction, atoms cannot form electromagnetic bridges between them. That means the dark matter clots are things that are more like clouds their WIMPs move very fast. So, those things are more like some kind of fog than planets. If WIMPs are black holes that kind of thing is possible. 

"This snippet from a supercomputer simulation shows just over 1 million years of cosmic evolution between two converging cold streams of gas. It’s only through the electromagnetic interaction that these streams of gas can radiate heat away, becoming, and remaining, cold. In this short interval, just a little over 100 million years after the Big Bang, clumps of matter grow to possess individual stars containing tens of thousands of solar masses each in the densest regions, and could lead to direct collapse black holes of an estimated ~40,000 solar masses." (BigThink, Ask Ethan: Why doesn’t dark matter collapse due to gravity?)

"This simulation shows particles in a gas of a random initial speed/energy distribution colliding with one another, thermalizing, and approaching the Maxwell-Boltzmann distribution. The state of reaching thermal equilibrium is when all parts of the system can exchange energy, collide with, and interact with all other parts of the system freely, and is easy to achieve for a closed, isolated, unchanging system. By contrast, the expanding Universe is wildly out of equilibrium." (BigThink, Ask Ethan: Why doesn’t dark matter collapse due to gravity?)

The only known dark matter's mutual interaction is gravity. This means that if dark matter particles will make some objects whose mass is similar to stars and planets those particles must be close enough to each other. The distance between particles must be so close to each other that gravity can pull them together. 

When the only known interaction between WIMPs is gravity that means they must impact each other precisely. If WIMPs travel past each other that means they cannot touch each other and they fly away. But that requires that the WIMPs impact each other. And nobody knows if is there any interaction between those hypothetical particles even in that case. Or is it possible that WIMPs can form other kind of things than singularity? 

Dark matter can form similar structures in the universe like nebulas or clouds. And they can probably form black holes in special cases. But the things like dark matter clots are not like planets. They can be structures of the WIMPs there those things are close to each other. 

So, if dark matter formed some heavy objects that happened in the young universe. It's possible, that WIMPs participate in the formation of the primordial or very first black hole.  In this modern universe the distance between weakly interacting massive particles, WIMPs is too long that gravity can pull them together. 

The only thing that can pull dark matter inside it in the modern universe is a black hole. Or maybe a neutron star can make that thing. But can a neutron star store those particles in it? 

Calculating the mass of WIMP requires that astronomers know the mass of visible material around a black hole or neutron star. Then they must observe how the mass of that object rises. The difference between real mass and calculated mass is the mass of WIMPs. If they are real material or real particles. The WIMP can be the quasiparticle or very small particle that forms the gravitational pothole around it. 

The gravitational pothole is the lower energy point in the energy field. When the energy level around the WIMP turns lower that means the gravity pothole around WIMP turns lower. That means the expansion of the universe pulls gravity away from the dark matter. For forming planets or stellar mass objects the WIMP particles should be far closer to each other than in the modern universe. But dark matter is a mystery. Lots of the universe is gone somewhere. And the thing that tells about it is the mysterious gravity effect. And the source of that effect is one of the biggest mysteries. 

https://bigthink.com/starts-with-a-bang/doesnt-dark-matter-collapse-gravity/

https://en.wikipedia.org/wiki/Kugelblitz_(astrophysics)

https://en.wikipedia.org/wiki/Weakly_interacting_massive_particle