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Muons: The Subatomic Particles Shaking Up the World of Physics

December showcases the discovery of the muon a heavier cousin of the electron and its role in testing the theory of electromagnetism.

particle physicists use particle track detectors to determine the lifetime of short lived particles a muon has a mean lifetime of 22 s and makes a track 114 cm long before decaying into an e 83752

Muons are unstable subatomic particles that decay to electrons with a mean lifetime of 2.2μs . They are produced when cosmic rays bombard the upper atmosphere about 10 km above the earth's surface, and they travel very close to the speed of light. The problem we want to address is why we see any of them at the earth's surface. (a) What is the greatest distance a muon could travel during its 2.2 -lifetime? (b) According to your answer in part (a), it would seem that muons could never make it to t

Closeup of data being collected and analyzed by scientists, as they track the decay of multiple muons and calculate their average lifetime.

Real-Time Anomaly Detection in the Calorimeter Level 1 Trigger at CMS, Andrew Ji, UG '25 (13139)

Anomaly no more! "Muon g-2" puzzle resolved at last

Muon mystery: New measurements challenge quantum theory