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#Science

Expert talks about self-interacting dark matter in new video

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Physicists haven’t been able to explain the Dark matter, which is five times more prevalent than ordinary matter; however, there have been evidence that suggests that this new matter does exist, but scientists know only a little about its nature.

In a new video Dr. Don Lincoln, who is an American particle physics researcher at Fermi National Accelerator Laboratory and adjunct Professor of Physics at the University of Notre Dame, talks about an exciting and unconventional idea, specifically that dark matter might have a very complex set of structures and interactions. While this idea is entirely speculative, it is an interesting hypothesis and one that scientists are investigating.

Dr Lincoln explains that just 5 per cent of the matter in Universe we see is made from ordinary matter, 25 per cent is made up of what physicists and scientists call the dark matter and 70 per cent if made up of dark energy.

Talking about dark matter the professor goes on to talk about Weakly Interacting Massive Particle (WIMP) as a likely candidate for dark matter and how it helps explains some of the unsolved mysteries of astronomy. However, it doesn’t help explain all the mysteries and there are some possible weaknesses of WIMP theories.

Dr Lincoln says that physicists are contemplating the possibility that dark matter may have a different kind of charge – a dark charge – with which ordinary matter don’t react. The dark photos zip by ordinary matter without interacting with it at all. The professor says that ordinary matter is made up of complex particles that interact with each other by at least five known forces so why can’t dark matter be made up of such complex particles that haven’t been detected yet.

Talking about the proposal of self-interacting dark matter, Dr Lincoln says that this model suggests that dark matter is more complicated than previously thought. In this model, in addition to the traditional WIMP, there are two forms of charged dark matter with one of the particles being heavy and other being light. This is kind of imagining a dark matter proton and a dark matter electron that could conceivably bind dark matter protons and electrons to form dark matter atoms.

However, the professor says: “I should caution you against making too much of an analogy.” The reasons Dr Lincoln cautions against making too much of an analogy is that if one goes all the way into imagining dark matter molecules, planets, galaxies and so on.

Check the video [embedded above] for more on dark matter.