ATLAS Achieves Unprecedented Precision in Measuring Higgs Boson's Mass

The ATLAS experiment at CERN has achieved a record precision in measuring the mass of the Higgs boson, reaching an unprecedented level of 0.09%. The Higgs boson's mass is a fundamental parameter that governs its interactions with other particles and is crucial for testing the predictions of the Standard Model. The new measurement combines data from the diphoton channel and the four-lepton channel, resulting in a mass of 125.11 GeV with a precision of 0.09%. The achievement is attributed to advanced calibration techniques and improvements in photon energy measurements.