Print this article A subatomic particle known as a muon is disobeying the basic laws of physics, according to preliminary results from two separate experiments debuted on Wednesday. The Muon g-2 experiment at the Department of Energy’s Fermi National Accelerator Laboratory showed that fundamental particles called muons are behaving in a way that is not predicted by the physicist's best theory, known as the Standard Model of particle physics, the reported. A team of over 200 researchers suggested that the particles are not doing what is expected of them when they are spun around in two different long-term experiments conducted in the United States and Europe, hinting at a potential overhaul of the rulebook that physicists have long used to understand the universe at the subatomic level.