Dark photons can be the most promising candidates for dark matter.

"These include WIMPs (Weakly Interacting Massive Particles), primordial black holes (PBHs), axions, and "dark photons." In theory, this particle was responsible for heating the early Universe and acts as a bridge between the "visible" and dark sectors of the cosmos. According to a new paper, dark photons would not have heated the early Universe as previously thought. Their findings could alter the hunt for Dark Matter by suggesting that dark photons could be hiding in more places than previously thought." (UniverseToday, New Study Expands Search for "Dark Photons," a Leading Dark Matter Candidate)

The thing. What makes a dark photon dark is simple. Dark photon. It must. Have a temperature. Lower than the environment's temperature.  Absolute zero, or zero kelvin (0K), is -273,15 C. The universe’s temperature is three degrees higher. Than. This temperature. So, the photon must have an energy level lower than 3K. 

That. It turns into dark. Energy travels into a lower-energy area. So. The thing. That makes a particle dark is energy that travels into it. 

Absolute zero is the energy minimum. In. The universe. Or the final temperature that we can measure. At that temperature, Helium-3 freezes. But it's possible. That. The electron and proton clouds can have a lower energy level. 

Absolute zero. The object will not transfer its energy. Into. Other particles. There are no other particles. Whose energy level is lower. But when we talk about the energy minimum. We must understand. 

That the local energy minimum is not the same as the energy minimum in space between galactic clusters. 

The energy minimum in our solar system is higher than in interstellar space. When. An object comes from outside space into our solar system. 

It must warm up a little bit. So. It cannot reflect energy until it reaches the energy level. That is higher than its environment. This means. photons that. Come into our galaxy can be invisible because their energy level is lower than the energy minimum in our galaxy. 

A dark photon is a hypothetical particle proposed as the force carrier of a hidden "dark sector," much as the ordinary photon carries electromagnetism. It would interact with normal matter only feebly, through a quantum effect called kinetic mixing. The interaction happens only if the photon’s superstring hits a particle. 

Dark photons are candidates for dark matter. But nobody has found them yet. A hypothetical dark photon is a photon whose energy level is lower than the known energy minimum in the universe. Dark photons can form in some cases.  A superstring that forms a photon starts to spin like a plate. The superstring can have a twisted structure. Similar to a spring.

 When the photon spins like a wheel. That. Structure pulls energy from around it. While. That structure spins. It. Releases energy between those twists. Or if some superstring travels through the center of the photon. That straight superstring acts like a thermal pump. And then that pulls the energy level of photons. Lower than the known energy minimum in the universe.

The low-energy photon starts to bind quantum fields. That makes it behave as if it has mass. The third possible model for the dark photon is. The dark photon is a structure that spins very fast. This means it binds energy. When the universe expands, those photons deliver energy. 

"Diagram of the Meissner effect. Magnetic field lines, represented as arrows, are excluded from a superconductor when it is below its critical temperature." (Wikipedia, Meissner effect)

Could the WIMP (Weakly Interacting Massive Particle) be the quasiparticle that forms when extremely fast-spinning photons come to the regular universe?

Maybe. Those ultra-fast-spinning particles can form in cosmic voids. When. Those particles travel into the “regular” universe. They must deliver their energy. So that means the energy that those particles send. It can form part of dark energy.

When those. Ultra-fast-spinning photons arrive from cosmic voids to the regular universe. They deliver their energy. That forms the quantum bubble. Energy escapes very fast from those photons. And that can decrease their energy level. To a lower level. Than in the regular universe. This bubble is the quasiparticle that could explain why dark matter is not found. The expansion of the universe decreases the energy level in the universe. 

But. It decreases that photon’s mass. And the dark photon’s energy level is always, let’s say, two degrees below absolute zero. That temperature is just an example. The idea is that the temperature difference between those hypothetical dark photons and the space is always the same. 

The temperature of the dark photon. It must not be. The same as zero kelvin. It must only be lower than its environment. This means. That. The particle’s temperature must be below three Kelvin. Cosmic background. Or three Kelvin radiation. Means that. The particle. That is, colder than three K will be invisible. 

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A dark photon. It can turn. The gravitational field opposite. The idea is that. Gravitational waves are like ditches. That move on the layer. The layer is the background. There is a possibility. Gravitational waves’ bottoms turn into a higher energy level than their environment. This turns gravity opposite. So can gravity turn opposite outside the universe? 

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Dark photons are also interesting. Because. They could make anti-gravitation possible. A gravitational wave is like a ditch that travels through the universe. The expansion of the universe makes a geometrical form of that ditch that causes objects to fall backward. Or it falls objects into the gravitational centers. The gravitational wave is a ditch that travels on the quantum layer.

The thing. That could. Turn those energy ditches into energy hills that push objects away is to decrease the energy level. In the environment to such a low level. That it decreases the level. Below the bottom of those energy ditches. So this hypothetical thing.

Happens decreasing. The energy level of the background. So low. That the bottom of gravitational waves is higher than their background. And if dark photons exist. Or reseachers can create them. That makes it possible. To create conditions. That turn gravitational waves opposite. Another interesting detail is this. 

If. Those low-energy photons can be created on a very large scale. This can cause energy flow to the surface. And if that happens from below. That effect pushes the object upward. This effect is known as the Meissner effect. The thing. That makes superconducting objects levitate. Meissner effect means the magnetic effect. And. Airflow combination. 

That keeps the object levitating. But if low-energy photons cause that effect. The reflection from the object is minimal. Those photons can bind energy and wave movement. And if we can make the photon's energy level lower than the local energy minimum. That means those photons can bind wave movement. This makes the surface invisible. 

https://www.universetoday.com/articles/new-study-expands-search-for-dark-photons-a-leading-dark-matter-candidate

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

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

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

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

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

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