project
CERN's underground particle accelerator near Geneva, the world's most powerful, colliding protons and ions to study fundamental physics.
CMS physicists have measured, for the first time, the diffusion wakes jets leave behind in quark-gluon plasma, 20 years after they were first predicted. The result adds a second test of the fluid picture of the matter that filled the universe for its first microseconds.
Reality
CMS combined 138 fb-1 of 2016-2018 collision data and measured a Higgs signal strength of 1.01 +/- 0.05, against a Standard Model value of 1. Any new physics that alters the Higgs rate now has room mainly near or below that 5 percent precision.
Reality
Reading a cosmic-ray shower has always meant trusting a computer model of what happens in air. Last July the LHC made the collision those models start from, under conditions physicists chose.
Reality
CERN crews have begun dismantling the LHC around ATLAS and CMS to swap its focusing magnets for niobium-tin ones about 40% stronger. The first replacement quadrupole is not due in the tunnel until the start of 2029.
Reality
String-breaking, the moment a stretched bond between two building blocks of matter snaps and new particles appear, has now been observed on a trapped-ion quantum simulator at Duke. Two other groups saw it on different hardware.
Reality
A search of LHC collision data for microscopic quantum black holes found none. The exclusion limit that follows is the publishable result. Where that limit sits decides whether theorists have to move.
Reality
IRAS 18293-0941 is the first microblazar found in our own galaxy. The authors say the spot where its jet strikes a molecular cloud accelerates particles to petaelectronvolt energies, matching a gamma-ray signal there.
Reality
The LHC spent part of July 2025 colliding protons with oxygen nuclei to imitate a cosmic ray hitting air, and ATLAS's measurement is now finer than the disagreements among the seven codes used to model showers.
Reality
Entanglement had been confirmed in photons, electrons and trapped ions, all relatively long-lived systems. An Oxford-led team has now found it in Z bosons made inside the LHC's most violent collisions.
Reality
Tamas Vami and Danyi Zhang looked through CMS data for microscopic black holes, found none, and published the bound. They also describe the search itself as a new way to look for new particles.
Reality
The two bosons decay before any instrument can touch them, so the team read their spins from the angles of the leptons left behind in 13 trillion electron volt proton collisions. Physical Review Letters has the result.
Reality
ALICE turned near-miss lead collisions into a photon beam and scanned momentum transfer down to a resolution of 0.2 femtometers, about a quarter of a proton. The drop in J/psi production it found there was not expected.
Reality
A Sophia University calculation of 5.36 TeV oxygen-oxygen collisions at the LHC counts how much of the matter actually equilibrates, and finds a nonequilibrated remainder near 30% that survives even the most central events.
Reality
An efficiency ratio can double while the electricity bill keeps climbing. That gap is where the case for the next collider gets argued, and won.
Reality
The elliptic signal says neon-20 is not spherical. The triangular signal runs the wrong way, and no number for the deformation survives that disagreement.
Reality
A Michigan-led ATLAS analysis claims world-best sensitivity to the Higgs boson interacting with itself, using machine learning on data already in hand, four years before the LHC upgrade.
Reality