Approximately 80% of the universe's matter is composed of a mysterious and unseen substance. This 'dark matter' was first theorized nearly 90 years ago. “This was the only way to reconcile the velocity distribution of visible matter within galaxies with existing knowledge,” explains Jörg Pretz, o
About 80% of the universe’s matter is an undetected substance called “dark matter.” While its existence has been theorized for about 90 years, scientists at the JEDI collaboration, using advanced particle accelerator techniques, are developing new methods to detect it, although conclusive evidence remains elusive.
Physicists have been searching for this matter since the 1930s. Science has no shortage of theories, but no one has yet succeeded in actually detecting dark matter. “This is because the nature of dark matter is still completely unclear,” says Dr. Volker Hejny, who is also from Jülich’s Nuclear Physics Institute and, like his colleague Jörg Pretz, is a member of the international JEDI collaboration that conducted the experiment.
In their experiment, the JEDI scientists utilized a special feature of the Jülich particle accelerator COSY: the use of polarized beams. Credit: Forschungszentrum Jülich / Ralf-Uwe Limbach MRI technology is also used to search for dark matter. While in normal MRI the atoms are at rest, in an accelerator the particles move almost at the speed of light. This makes the examinations in some areas much more sensitive and the measurements more accurate.
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