"The new measurement, however, nearly matches its precision but agrees with the Standard Model. Leaders of the new study say it reassures them that their basic understanding of the W boson is likely on track."
"While it would have been thrilling to confirm the CDF result, what I really wanted was to publish a result that will stand the test of time, says Massachusetts Institute of Technology physicist Kenneth Long."
Physicists measured the mass of the W boson particle at the Large Hadron Collider, confirming its mass aligns with the Standard Model. The W boson, significantly heavier than protons, carries the weak force, crucial for particle transformations. A previous measurement from Fermilab suggested a discrepancy with the Standard Model, indicating potential issues in particle physics. The new measurement, conducted at the LHC's CMS experiment, nearly matches the precision of the Fermilab result but supports the Standard Model, reassuring physicists about their understanding of the W boson.
Read at www.scientificamerican.com
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