light ion

Shape-shifting collisions probe secrets of early Universe

The first high-energy collisions between light nuclei at the Large Hadron Collider confirm the unusual “bowling-pin” shape of neon nuclei and offer up a new tool to study the extreme state of matter produced in the aftermath of the Big Bang.

18 September 2025

Hunting for jet quenching in collisions between oxygen nuclei

The ATLAS Collaboration has just released its first search for jet quenching in oxygen–oxygen collisions.

8 September 2025

Bowling balls vs. bowling pins? ATLAS studies the unique shape of neon ions

The ATLAS Collaboration today presented their first study of oxygen and neon collisions at the Initial Stages conference, including first measurements of elliptic flow.

8 September 2025

ATLAS takes a breath of oxygen

The ATLAS Experiment at CERN dives into uncharted waters, recording its first-ever collisions of oxygen and neon ions. These are not your typical heavy-ion collisions. Oxygen and neon nuclei are far smaller than lead – the LHC’s usual candidate for ion runs – and offer physicists exciting new opportunities to study the strong force.

1 July 2025