This new measurement, which is a first for the CMS experiment, uses a new technique that makes it the most elaborate investigation of the W boson's mass to date.

Learn about the Compact Muon Solenoid (CMS) experiment at CERN's Large Hadron Collider, including its purpose, design and achievements.

The CMS experiment has now contributed to this global endeavor with its first W boson mass measurement. The keenly anticipated result, 80,360.2 with an uncertainty of 9.9 MeV, ...

Despite years of searching, both CMS and another LHC experiment, ATLAS, have yet to find conclusive evidence to validate the theory of supersymmetry. Valentin Flauraud/AFP via Getty Images.

Physicists at CMS are trying to change that. Like particles produced in other experiments at CERN, the hypothetical dark photons would be produced by the decay of another particle: the Higgs boson ...

Physicists on the CMS experiment announce the most elaborate mass measurement of a particle that is notoriously difficult to study and has captivated the physics community for decades. After an ...

The CMS experiment has now contributed to this global endeavor with its first W boson mass measurement. The keenly anticipated result, 80,360.2 with an uncertainty of 9.9 MeV, ...

The CMS experiment is distinct from the other experiments that have made this measurement because of its compact design, its specialized sensors for fundamental particles called muons, and its ...

Physicists on the CMS experiment announce the most elaborate mass measurement of a particle that is notoriously difficult to study and has captivated the physics community for decades.