CMS

Over 100 participants convened at Fermi National Accelerator Laboratory for the 2025 CMS Data Analysis School, an intensive program dedicated to preparing the next generation of physicists for work on the CMS experiment at CERN. Hosted by the LHC Physics Center at Fermilab, the week-long event included lectures, hands-on exercises and collaborative analysis projects designed to enhance participants’ expertise in particle physics data analysis.

A large and unexpected excess of top quark pairs has the physics community excited, but the interpretation is still up for debate.

A key milestone in the U.S.-funded upgrade to the CMS experiment was achieved with the successful delivery of a 5-meter-long carbon support tube to CERN. Designed and built at Purdue University, the tube will house new inner particle detectors for CMS, which is being prepared for the high-luminosity upgrade of the Large Hadron Collider. The CMS collaboration is composed of scientists from roughly 240 institutions spread across more than 50 countries.

Following nearly a decade of analysis, the CMS experiment has found that the W boson’s mass aligns perfectly with Standard Model predictions with remarkable accuracy.

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.

The CMS experiment is developing a new type of trigger that looks for anomalies — one-in-a-billion events that show something new or unexpected.

During a ceremony at ICHEP, Ngadiuba’s contributions to ultra-fast machine learning techniques and anomaly detection were recognized by the International Union of Pure and Applied Physics.

The CMS collaboration announced the observation of two photons creating two tau leptons in proton–proton collisions. This is the first time this process has been seen in proton–proton collisions using the precise capabilities of the CMS detector. It is also the most precise measurement of the tau’s anomalous magnetic moment and offers a new way to constrain the existence of new physics.

The U.S. Department of Energy has given the green light for the U.S.-funded portion of the upgrades to the CMS experiment at CERN. The massive overhaul will prepare the experiment for the high-luminosity era of particle collisions at the Large Hadron Collider.

One of the big, recent innovations by the CMS collaboration—a new trigger installed in their experiment at the Large Hadron Collider—has produced its first data set. The analysis of this data has started. Scientists expect it will either reveal new physics or set more stringent limits in the search for long-lived particles.