With this measurement the LHC is again demonstrating its ability to provide very high-precision measurements and bringing new insights into an old mystery

Using the outstanding tracking capabilities of the CMS detector, the collaboration observed two photons producing two tau-leptons in proton–proton collisions

The CMS collaboration has measured the speed of sound in the quark–gluon plasma more precisely than ever before, offering new insights into this extremely hot state of matter

The collimation system of the Large Hadron Collider (LHC), which protects the accelerator’s components, needs an upgrade to be able to handle the performance of CERN’s future accelerator

This search for exotic long-lived particles looks at the possibility of “dark photon” production, which would occur when a Higgs boson decays into muons displaced in the detector

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 CMS collaboration sheds light on hadron formation

CMS presents results of searches for long-lived neutral particles

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