The increase in data processing capabilities means that CMS is one step closer to being ready for Run 4. The new Data Acquisition (DAQ) room is a state-of-the-art server room, essential for the Hi-Lumi phase of the detector and beyond. New server…

An interactive version of the event display is found on a separate, full page here. For the first time at a hadron collider, the CMS experiment measures the mass of the W boson from hadrons. Hadrons are particles made out of quarks and gluons, and…

  The CMS collaboration expands the search for supersymmetry by exploring a wide variety of final states with boosted particles, in a new analysis called “razor boost”. Supersymmetry, or SUSY, which suggests that every known particle has a new…

CMS breaks new ground by reconstructing challenging photon signatures using machine learning, opening new paths in the search for physics beyond the standard model. What if a new exotic particle from a non-standard Higgs boson decay escaped…

  Remember the media buzz when we finally pinned down the Higgs boson in 2012? Turns out it might have a shadowy cousin – the dark Higgs – and CMS is chasing it down. CMS scoured its entire Run 2 data set,138 fb–1 of proton-proton collisions at…

  For the first time, the CMS experiment measures the production of single top quarks in a mode called the “t-channel” at 5.02 TeV, reporting results aligned with the standard model expectations. In the quest to probe the fundamental laws of…

The CMS collaboration has developed a new technique to distinguish electron-positron pairs travelling so closely together that we see them as a single cluster of deposited energy. Identifying electrons is one of the greatest strengths of the CMS…

  By observing decays of Higgs bosons into pairs of photons, the CMS experiment probes anomalous interactions, including those between Higgs bosons and W/Z bosons or gluons when all particles are replaced with their antiparticles and space is…

  The CMS experiment announces new results for the EPS-HEP conference 2025 in Marseille. The new results comprise searches for new phenomena using exotic signatures to precision measurements of standard model processes. Links to the Physics…

This year, the LHC is colliding more than protons and lead ions: oxygen and neon have also made it into the collider, and are being studied by CMS and the other LHC experiments in order to understand the early universe! This is the first time that…

The CMS experiment sets limits for BSM particles down to tens-of-MeV aided by machine learning techniques. Axion-like particles (ALPs) are hypothetical light-weight neutral bosons that could solve deep mysteries in physics, from the strong CP…

On the 9th of June, CMS took part in the annual ‘Colour Run’ in Cessy, France. This is a local event organised by the Cessy town hall for the people of Cessy and Pays du Gex, and features a 5km fun run with powdered paint being thrown at 1km…