Large Hadron Collider

CERN finds quantum entanglement among heaviest particles ever tested

Physicists working with the ATLAS detector at CERN's Large Hadron Collider have found strong evidence of quantum entanglement between pairs of Z bosons produced in the decay of Higgs bosons, extending one of quantum mechanics' most puzzling phenomena to the…

CERN recreates cosmic ray showers in the lab for the first time

Physicists working with CERN's Large Hadron Collider have produced the first laboratory measurements of cosmic ray collisions with atmospheric gases, offering a new window into the particle showers that constantly bombard Earth. The results, published in Physical Review Letters, are…

CERN scientists create quark-gluon plasma with lightest nuclei ever

Physicists working at CERN have demonstrated that quark-gluon plasma — the primordial state of matter that filled the universe during its first millionth of a second — can be produced by smashing together nuclei far lighter than previously thought possible.…

CERN experiment finds evidence that challenges how physicists explain gluon behavior

A new measurement from CERN's ALICE experiment has provided the sharpest view yet of how gluons behave inside atomic nuclei, challenging the long-standing theoretical framework known as nuclear shadowing and offering evidence for a competing phenomenon called gluon saturation.

CERN shuts down Large Hadron Collider for $1.5B upgrade

The world's most powerful particle accelerator fell silent on Monday as CERN switched off the Large Hadron Collider, marking the beginning of Long Shutdown 3 — a four-year overhaul that will transform the machine into the High-Luminosity LHC.