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Physics

The W boson gave particle physicists a major shock in 2022

Physicists are still puzzled by a new measurement of a fundamental particle called the W boson, which doesn't agree with our existing understanding of the universe

By Alex Wilkins

14 December 2022

Collider Detector at Fermilab

The Collider Detector at Fermilab, which measured the mass of the W boson

Corbis via Getty Images

A shock measurement of the mass of a fundamental particle called the W boson ignited the physics world in April, as it appeared to flout the standard model of particle physics.

Hundreds of papers have been written since then to try to explain the result, which seems to defy our best theory of how the universe works. Experiments have been proposed to confirm the findings, while the facts and figures have been pored over to look for possible …

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