A decade of science and trillions of collisions show the W boson is more massive than expected – a physicist on the team explains what it means for the Standard Model

Measuring the mass of W bosons took 10 years — and the result was not what physicists expected. (Image credit: PM Images/Digital Vision via Getty Images)

This article was originally published at The Conversation. The publication contributed the article to Space.com’s Expert Voices: Op-Eds & Insights.

John ConwayProfessor of Physics, University of California, Davis

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