Muons
Muons are fundamental particles belonging to the lepton family, similar to electrons but approximately 207 times more massive. They are produced when cosmic rays collide with Earth’s atmosphere and decay into electrons and neutrinos with a mean lifetime of about 2.2 microseconds. Despite their brief existence, muons penetrate deep into Earth’s atmosphere and reach the surface, making them detectable in particle physics experiments.
Magnetic Properties
The magnetic moment of the muon is a critical parameter in testing the Standard Model of particle physics. Deviations between the theoretical prediction and experimental measurement of the anomalous magnetic dipole moment, often denoted as , provide a sensitive probe for new physics beyond the Standard Model. The Fermilab Muon g-2 experiment continues to investigate this property using specific methodologies to refine these measurements, with further results expected in 2025 to clarify the extent of any discrepancy.