Ultra-Precise Particle Measurement Narrows Pathway to ‘New Physics’

image via New Scientist

September 19, 2024, 4:15 PM

Physicists have nailed a fiendishly difficult measurement — the mass of the fundamental particle the W boson. The result, from the CMS experiment at the Large Hadron Collider (LHC), is in line with the predictions of the standard model, and pours cold water on an anomaly in the W boson mass that surfaced in 2022. That measurement had hinted at the existence of phenomena beyond the standard model, physicists’ best description of particles and forces.

Read original article