Science and Technology Facilities Council
Evidence of new physics in highly-anticipated g-2 results
A much-anticipated result from an international science experiment provides strong evidence for the existence of an undiscovered subatomic particle or new force.
The Muon g-2 ring sits in its detector hall amidst electronics racks, the muon beamline, and other equipment. This impressive experiment operates at negative 450 degrees Fahrenheit and studies the precession (or wobble) of muons as they travel through the magnetic field. Credit: Fermilab/Reidar Hahn
The result was yesterday announced, from the Muon g-2 experiment at the Fermi National Accelerator Laboratory. It provides tantalising evidence that the elementary particles called muons are not behaving in the way they are supposed to according to the leading theory of physics – the Standard Model.
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