Surprise W boson measurement could rewrite particle physics

A tiny subatomic particle called the W particle may be heavier than scientists previously thought and it could shake up physics theory of everything

Scientists at the US Fermi National Accelerator Laboratory have spent 10 years analyzing mass measurements of the W boson, a lesser-known “sister particle” of the Higgs boson that plays a role in radioactive decay. They found that the particle is slightly heavier than the physics theories had expected. And that, the scientists said: in a statementis quite something, as it is at odds with the so-called Standard modela fundamental theory of physics that describes how the world fits together on a micro scale.

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