Скачать или смотреть What is dark matter Another candidate particle discarded by researchers

What is dark matter Another candidate particle discarded by researchers.

Everything we can see, from our own reflection in the mirror to the farthest corners of the universe glimpsed by our telescopes, is only a mere 15 percent of the total mass of the observable universe. The remaining 85 percent is made up of that mysterious substance known as dark matter, and we do not know exactly what it is. Numerous hypothetical particles, such as photons and dark axions, have been proposed as constituents of dark matter. One of the qualities that these particles must possess is a really weak interaction with normal matter, since dark matter, despite its overwhelming presence in the universe, can only be detected by inference and not by direct observation.

As teams of scientists continue to search for these hypothetical particles, using innovative and elaborate experiments, they have not succeeded so far, at least in the conventional sense of the word. However, they have been able to place increasingly strict limits on the properties of these hypothetical particles, which allows them to search in more specific places or discard some of those particles completely. The National Laboratory Lawrence Berkeley of the Department of Energy said on November 8 that a recent experiment had greatly restricted the range of possibilities for the existence of dark photons. And researchers at the University of Sussex, UK, announced on Wednesday they had refuted the existence of a specific type of axion. in a wide range of possible masses. The data that the Sussex researchers were analyzing were obtained from an experiment at the Paul Scherrer Institut in Switzerland, and previously at the Institut Laue-Langevin in Grenoble, France.