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Muons’ magnetism matches theory, easing an enduring physics conundrum

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87% Informative

Muons have an internal magnetism that scientists have struggled to pin down.

Measurements of a magnetic quirk of the particles have long clashed with theoretical predictions.

Scientists report the most precise measurement yet of that property, the anomalous magnetic moment of the muon.

A team of physicists updated their theoretical prediction of that tweak based on the standard model.

The development highlights the growing impact of lattice QCD . The technique has unlocked a wide variety of particle physics calculations, such as determining where protons’ mass comes from. The muon g2 calculation is another success for the technique. “This is a step in a path in a well-established garden of results,” El-Khadra says. Now, the lattice QCD garden is in full bloom..

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