The new result combines 15 previous measurements to give the most precise determination of the top-quark mass to date

Join scientists from the four largest LHC experiments and other experts, live at the CERN Control Centre on 2 November 2023, 3 p.m. CET, for a recap of the first heavy-ion run of the LHC Run 3

Following the completion of a successful in-house development phase, CERN is equipping the ATLAS and CMS detectors with new carbon dioxide (CO2) cooling systems that will contribute to the transition towards green and sustainable technology in this area

The result showcases the power of the LHC to push the precision frontier and improve our understanding of nature

New result from the ATLAS experiment at CERN reaches the unprecedented precision of 0.09%

The ATLAS and CMS collaborations have joined forces to establish the first evidence of the rare decay of the Higgs boson into a Z boson and a photon

The ATLAS collaboration tested Higgs-boson interactions with the carriers of the weak force, looking for signs of charge-parity symmetry violation

The ATLAS and CMS collaborations have both observed the simultaneous production of four top quarks, a rare phenomenon that could hold the key to physics beyond the Standard Model

An improved ATLAS measurement of the W boson mass is in line with the Standard Model of particle physics

The ATLAS collaboration at CERN welcomes a new management team at its helm. Spokesperson Andreas Hoecker (CERN) will continue to steer the experiment until February 2025

Precise knowledge of luminosity is crucial for both searches for new phenomena and precision measurements of known Standard Model processes