Combining measurements from two Higgs boson decay channels, the CMS experiment determines the particle’s mass to be 125.065 GeV, with an uncertainty of just 88 MeV. This is the most precise measurement of the Higgs boson mass achieved by a sin…

Originally posted on the September EP Newsletter The CMS detector still looks familiar, but empty racks and cable trays reveal that its Phase-2 transformation has begun. Removing around 600 m³ of legacy services safely, traceably and without interrup…

The core of the CMS experiment, the tracker pixel detector, has been removed after a decade of successful operation.  Acting as the detector’s innermost tracker, it recorded signals left by charged particles, enabling scientists to reconstruct t…