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Physicists zero in on the mass of the fundamental W boson particle

Recently, scientists have determined the mass of the W boson by analyzing more than 1 billion proton-colliding events produced by the LHC at CERN. The precision of the new measurement is on par with a previous measurement made in 2022 by the CDF at Fermilab.

New fundamental physics measurement deepens quantum mystery

A 2022 measurement of the W boson’s mass by the CDF experiment at the Fermilab, while the most precise measurement, differed from the Standard Model prediction. Now, a new calculation of the W boson particle by the CMS collaboration agrees with the Standard Model.

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