Electron and muon magnetic moments search for New Physics ⚡ экспресс
Particles have their own weak magnetic field, and its strength is slightly different from theoretical predictions. Physicists combined the measurements for the muon and electron so that excess noise canceled out — like subtracting common noise from two photographs. What remains is a clean signal that could point to new particles or forces. What's hidden in this difference?
Electrons and muons are tiny magnets. Their magnetism is slightly more than two (in special units), and this 'excess fraction' (anomalous magnetic moment) arises from constant ripples in the vacuum: particle pairs momentarily pop into existence and vanish. For the muon—the heavy cousin of the electron—this excess is more noticeable, meaning it senses the unknown more keenly.
The trick is to combine the readings of the electron and muon so that the main interference—from the strong interactions that glue the nucleus—cancels out. Like a radio receiver: noise fades, and a clean signal emerges. The remainder points to new particles or forces. Uncertainty drops by 85%.
The problem: we need jeweler's precision in measuring the electron's extra bit. Experimenters are already at work. It was started by Julian Schwinger in 1948, and now measurement precision has skyrocketed millions of times.
🎯 The muon is about 207 times heavier than the electron but lives only 2.2 microseconds—a true mayfly of the microworld.