A new analysis of W bosons suggests these particles are significantly heavier than predicted by the standard model of particle physics.
: The standard model of particle physics is the most successful scientific theory of all time. In this explainer, Cambridge University physicist David Tong recreates the model, piece by piece, to provide some intuition for how the fundamental building blocks of our universe fit together. Video: Emily Buder, Kristina Armitage, Rui Braz /Quanta Magazine
But while theorists had various reasons to expect the top quark and the Higgs to exist, and to be connected to the W boson through the equations of the standard model, today the theory has no obviously missing pieces. Any remaining discrepancy in the W boson’s mass would point toward the unknown.CDF’s new mass measurement is based on an analysis of about 4 million W bosons produced at the Tevatron between 2002 and 2011.
Nearly a decade after that last analysis, the collaboration has finally come up for air. In a November 2020 meeting over Zoom, Kotwal decrypted the team’s result with the press of a button.
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