The CMS collaboration’s measurement of the electroweak mixing angle showcased unprecedented precision, affirming the Standard Model and setting the stage for future collider physics. Credit: CERN
With this measurement, the Large Hadron Collider again demonstrated its ability to provide very high-precision measurements and bring new insights into an old mystery.
The CMS collaboration revealed a groundbreaking measurement of the electroweak mixing angle, confirming Standard Model predictions and addressing previous discrepancies with the most precise collider-based measurement to date. This achievement highlights the potential for precision physics in hadron colliders and prepares for more advanced studies at the High-Luminosity LHC.
Electroweak Mixing Measurement
At the annual Rencontres de Moriond conference, the CMS collaboration presented a measurement of the effective leptonic electroweak mixing angle. The result is the most precise measurement performed at a hadron collider to date and is in good agreement with the prediction from the Standard Model.
Overview of the Standard Model
The Standard Model of Particle Physics is the most precise description to date of particles and their interactions. Precise measurements of its parameters, combined with precise theoretical calculations, yield spectacular predictive power that allows phenomena to be determined even before they are directly observed. In this way, the Model successfully constrained the masses of the W and Z bosons (discovered at
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