For the first time, the CMS experiment has observed the rare electroweak production of two Z bosons in association with two jets. This achievement completes the observation of all electroweak productions of vector boson pairs (WW, WZ, and ZZ…

  The CMS experiment provides the first confirmation of the excess observed in top quark-antiquark production that is consistent with the short-lived bound state – toponium – decaying to a lepton + jets final state. Most matter around us is…

The CMS experiment has performed a new search for Charge-Parity violation in Higgs boson decays to tau leptons, shedding light on the origin of matter. Since its discovery in 2012, the Higgs boson has helped scientists explore some of the Universe’…

  For the first time, the CMS experiment probes quantum entanglement in Higgs boson decays to a pair of Z bosons. The result is the most general analysis of kinematic distributions in the four-lepton final state, measuring spin correlations and…

  In Run 3, CMS expanded its trigger program to enhance capturing long-lived particles that decay far away from the point of collision – broadening the search for physics beyond the Standard Model. Imagine a high-security vault. Most intruders…

For the first time ever, the CMS experiment has designed a dedicated analysis using parametrised machine learning to look for new dark particles that don’t socialize with Standard Model fermions, one of them being a favourite candidate in the…

  The CMS Collaboration reports the first measurements of the production of same-sign WW and WZ boson pairs in association with two jets at 13.6 TeV, using data collected during 2022–2024. One of the most powerful probes of the Higgs mechanism…

  The CMS Collaboration announces 38 new results for Moriond 2026. Here are the highlights of what we have presented so far. CMS reports an independent confirmation of the observed excess of top quark pair events at the production threshold (…

The CMS Collaboration reports the first measurement of coherent ϕ meson photoproduction, establishing a powerful new tool to explore the dense nuclear matter in the transition regime from perturbative to nonperturbative QCD. The CMS Collaboration…

An interactive version of the above event display can be found at this page. For the first time, the CMS experiment has demonstrated that machine learning can be used to reconstruct collisions at the LHC. This new approach improves the precision…

  The CMS experiment utilises cutting-edge machine learning techniques to search for microscopic, quantum black holes and other exotic objects that evaporate in an instant. Black holes are amongst the most fascinating objects in the universe.…

Upon close inspection, the tetraquark family members are consistent with tightly bound diquark pairs The CMS Collaboration has identified three extremely rare same-flavor teraquark states and determined, based on their spin-parity configuration,…