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 t…

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 search…