The CMS experiment at CERN is the latest to weigh in on the mass of the W boson—an elementary particle that, along with the Z boson, mediates the weak force, which is responsible for a form of ...

Last week, at the annual Rencontres de Moriond conference, the CMS collaboration presented a measurement of the effective leptonic electroweak mixing angle. The result is the most precise measurement ...

Scientists working on CERN’s Compact Muon Solenoid (CMS) experiment have published the latest data in their search for a long-lived exotic particle known as the dark photon. Dark photons (also called ...

The new calorimeter for CERN’s CMS experiment is one of the most challenging engineering projects in particle physics of all time. Dave Barney explains how it will be pivotal to the success of the ...

On Friday, the Large Hadron Collider at CERN had a day of smashing xenon nuclei together, a departure from its usual diet of protons or lead The picture at the top shows what happened in the CMS ...