The CMS experiment uses data collected between 2016 and 2026 to observe, for the first time, leptons (electrons and muons) emitted from protons scattering off one another.
Since the first high-energy proton colliders began operating more than…
A new boosted jet technique, powered by machine learning, gives CMS its most sensitive search for Higgs bosons breaking apart into never-before-seen particles.
Some theories predict that new light particles associated with the Higgs boson…
CMS has made the first search in the two-photon and two-bottom-quark final state for a heavy particle with masses from one to four trillion electronvolts.
In a first of its kind, CMS has carried out a search for a heavy particle, X, with masses…
CMS probes the highest-energy lepton pairs ever recorded to search for hints pointing to a Higgs boson made of smaller constituents.
Is the Higgs boson truly an elementary particle, or could it be composed of more fundamental constituents? This…
CMS investigates charm-quark jets in heavy-ion collisions and finds no evidence of additional radiation inside the dead cone
When lead ions collide at the Large Hadron Collider, they create an extreme state of matter known as the quark-gluon plasma…
The CMS experiment reports the first observation of a “wake” created by a fast-moving parton in quark-gluon plasma.
Wake effect in quark-gluon plasma
When the LHC collides heavy nuclei, such as lead, at nearly the speed of light, it creates…
The CMS experiment presents a novel search for new physics by studying collisions that produce three W or Z bosons.
The quest for new physics has taken scientists to the rarest corners of the Standard Model (SM) of Particle Physics. In a new…
The CMS experiment reports the observation of a peaking structure in the Υ(1S)ϕ(1020) channel in proton-proton collisions at 13 TeV.
Using the Run 2 proton-proton collision dataset collected at the LHC between 2016 and 2018, the CMS Collaboration…
Could there be more particles like the Higgs boson? For the first time, the CMS experiment has searched for the decay of the Higgs boson into two more Higgs-boson-like particles with unequal masses.
Some theories suggest that the Higgs boson…
The CMS experiment presents a first study of the ϒ mesons (bound states of a bottom quark and antiquark) produced within jets. The results reveal significant discrepancies between the observed data and current theoretical predictions,…
CMS probes the inside of quarks down to distances of 10–20 m – smaller than ever before – searching for potential more fundamental building blocks within them.
In our current understanding of nature, visible matter is made of quarks. Quarks…
The CMS Collaboration has completed the most precise measurement to date of top-quark production in association with a photon
Using the full Run 2 dataset of the LHC and advanced machine learning techniques, the CMS Collaboration has delivered the…