Astronomers have long been trying to understand what could be the origin of dark matter, the unusual structure that’s thriving in the Universe. It’s even a lot more abundant than the usual matter that we interact with every single day. But despite this aspect, there’s no telling what dark matter itself is in the first place.
What astronomers know for sure is that dark matter has a crucial role in the Cosmos. The emergence of stars, planets, and life itself wouldn’t have been possible without the existence of dark matter. But astronomers just proposed a new theory about the possible origin of the elusive form of matter.
Could dark matter come from other dimensions?
The new theory that LiveScience.com reveals and that’s proposed by Giacomo Cacciapaglia from the University of Lyon, along with physicists Haiying Cai and Seung J. Lee from the Korea University, implies that gravitons could be the particles that form dark matter itself. Nothing too surprising here since dark matter has to be made up of something. However, the question “why is there something rather than nothing?” is one of the most important ones that we can ask about the natural world, according to physicist Lawrence Krauss. But let’s leave that aspect aside a bit.
The same new theory goes on by proposing that dark matter could somehow be linked to other dimensions. Gravitons are thought to have been created in the first moment after the Big Bang, and scientists are now claiming that the particles could come from other dimensions. However, it’s important to keep in mind that the existence of gravitons hasn’t been fully proven yet.
Giacomo Cacciapaglia stated for Live Science:
Massive gravitons are produced by collisions of ordinary particles in the early universe. This process was believed to be too rare for the massive gravitons to be dark matter candidates.
The new work of the physicists claims that enough amount of gravitons might have existed in the early history of our Universe to account for all of the dark matter scientists can detect today.
The new study was published in Physical Review Letters.