"ATLAS: Groundbreaking Measurement of W-Boson Width at LHC"

The ATLAS collaboration at the Large Hadron Collider (LHC) has provided the first measurement of the W-boson width, a parameter that may hold clues about new physics phenomena. The measurement, based on proton-proton collision data, yielded a value of 2202 ± 47 MeV, consistent with the Standard-Model prediction. Achieving this precision required detailed particle-momentum analysis, accurate understanding of W-boson production, and knowledge of the inner structure of the proton. The measured values of the W-boson mass and width are consistent with the Standard-Model predictions, and future measurements using larger datasets are expected to further reduce uncertainties and enable more stringent tests of the Standard Model.